48 results about "Pregnancy rate" patented technology

The invention relates to the technical field of animal husbandry, in particular to a synchronous oestrus-timing insemination method suitable for cattle, which comprises the following steps: firstly, performing intramuscular injection of PG (cloprostenol sodium) at different time points after calving to promote uterine recovery and luteolysis and lay a synchronous oestrus foundation; the method comprises the key steps that GnRH (gonadotropin release hormone) is given through intramuscular injection on the 43rd day, the 53rd day, the 60th day and the 69th day, pituitary is promoted to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH), collection and screening of follicles are guided, follicle maturation is promoted, the oestrus uncovering rate and the oestrus conception rate are increased, a melatonin implant is implanted in a subcutaneous implantation mode on the 63rd day, and the melatonin implant is implanted in a subcutaneous implantation mode on the 63rd day. The synthesis of ovarian hormones is promoted by regulating the hypothalamus-pituitary-gonad axis, the secretion of follicle cell factors and maturation promoting factors is promoted, the development of granular cells is promoted, and the maturation of oocytes is promoted. According to the method, the pregnancy rate of a double-synchronization-timing insemination scheme which is most widely used in a large-scale dairy cow breeding pasture at present can be remarkably increased, and feasible technical support is provided for success of increasing the breeding efficiency of cows.

The invention discloses a timed insemination method for improving the pregnancy rate and the lambing rate of sheep, and belongs to the technical field of livestock breeding. In order to solve the problem that the pregnancy rate of existing sheep is unstable during regular insemination, the method comprises the steps that a progesterone sponge suppository is embedded in the vagina of a healthy and reproductive ewe on the 0th day, and meanwhile 25 g of luteinizing hormone is injected in an intramuscular mode to release hormone A3; removing the thrombus on the 12th day, and performing intramuscular injection of 400IU of pregnant mare serum gonadotropin at the same time; and after the suppository is removed, insemination is carried out on the cervix orifice of the ewe with ram semen diluted at the ratio of 1: (5-8) in 52h and 64h respectively. According to the method, ovarian activities of the ewes are regulated and controlled, the estrus synchronism and the ovulation rate are improved, tests show that the pregnancy rate reaches 81.6%, the lambing rate is 1.14, compared with a conventional method, the pregnancy rate and the lambing rate of the sheep are remarkably improved, and development of the sheep industry is promoted.

The application discloses an antioxidant combined diluent for improving the freezing preservation effect of sheep semen and application thereof. The mitochondrion-targeted antioxidant SS-31 is combined with the plant-derived antioxidant CUR for the freezing preservation of sheep semen, so that the generation and action of peroxides can be inhibited, the antioxidant capacity of sperm is enhanced, oxidative stress damage can be effectively avoided, the quality of frozen sheep semen is improved, the fertilization capacity is maintained or improved, and the pregnancy rate is improved.

The invention discloses a traditional Chinese medicine composition for treating PCOS pregnancy loss and application of the traditional Chinese medicine composition. The traditional Chinese medicine composition comprises the following raw material medicines in parts by weight: 20-40 parts of salted semen cuscutae, 20-40 parts of prepared rehmannia root, 10-20 parts of scutellaria baicalensis, 10-20 parts of dogwood, 20-30 parts of astragalus membranaceus, 20-30 parts of bighead atractylodes rhizome, 20-30 parts of white paeony root, 10-20 parts of parasitic loranthus and 10-20 parts of teasel According to the invention, active component groups (mass spectrum identification) and accurate compatibility design (kidney tonifying and miscarriage prevention theory) are defined, so that (1) the PCOS pregnancy rate is obviously increased (52%-80%, experimental verification); (2) synchronously improving reproduction-metabolism-uterus / placenta triple defects (data support such as a < HOMA-IR <->, a < Total T <->, a < Hif1 alpha > <-> and the like); and (3) the blank in the prior art is filled, and an integrated treatment scheme with both embryo protection and placenta function repair is provided. Experimental data, a molecular mechanism and traditional Chinese medicine theories prove the innovativeness and clinical value of the traditional Chinese medicine composition.

The application discloses a mesenchymal stem cell preparation and application thereof in thin endometrium repair, and comprises the following steps: adding Enterococcus durans CGMCC 1.3249 and Bacillus subtilis CGMCC 1.15792 supernatant as effective components into cultured mesenchymal stem cells; and the stem cell preparation obtained by the method can effectively restore the endometrial thickness of mice, increase the number of glands, and improve the pregnancy rate of the thin endometrium mice.

The invention relates to the technical field of biological medicine, and particularly discloses a recombinant bovine interferon coated sustained release microsphere and a preparation method and application thereof, an ultrasonic re-emulsification method is used for replacing bare-handed re-emulsification, 2.5% of trehalose is added into an internal water phase W1, and the protein concentration of the internal water phase W1 is reduced by 30 mg / ml to 25 mg / ml. According to the method provided by the invention, the encapsulation efficiency reaches 90% or above, the recovery rate reaches 95%, the drug loading rate is close to 5%, the balling rate exceeds 90%, and the in-vitro effective slow release time reaches about 10 days; through clinical supplement of the coated slow-release rbIFNT, the pregnancy rate of the receptor cattle in the initial test and the re-test is obviously improved by about 10%, and the pregnancy rate of the repeat breeding infertility young cattle in the initial test is obviously improved by about 15%.

The invention belongs to the technical field of animal breeding, and particularly relates to application of alpha-ketoglutaric acid or salt thereof in preparation of a sheep semen cryopreservation diluent. The invention discloses the application of alpha-ketoglutaric acid or salt thereof in the cryopreservation of the sheep semen for the first time, and the alpha-ketoglutaric acid or salt thereof can improve the semen quality of the frozen and unfrozen sheep semen and improve the fertilization ability of the frozen semen; such as sperm motility, sperm movement performance, sperm viability, sperm plasma membrane integrity rate, sperm acrosome integrity rate, sperm antioxidant capacity, sperm ATP level, sperm early apoptosis incidence rate, sperm in-vitro fertilized ovulation rate and / or artificial fertilization pregnancy rate, can be used for preparing the sheep sperm cryopreservation diluent.

The invention belongs to the technical field of traditional Chinese medicines, and particularly relates to a traditional Chinese medicine composition for treating polycystic ovarian syndrome as well as a preparation method and application thereof. The traditional Chinese medicine composition is prepared from Chinese yam, semen cuscutae, pulp of dogwood fruit, radix glehniae, radix scrophulariae, lily, rhizoma polygonati, tortoise shell, cistanche deserticola, lotus seed and raspberry, has the effects of tonifying kidney and replenishing essence, nourishing yin and blood, replenishing qi and tonifying spleen, and benefiting uterus and accommodating fetus, and is mainly used for treating the polycystic ovarian syndrome. Research results show that the traditional Chinese medicine composition can significantly improve the sex hormone level of a patient with the polycystic ovarian syndrome, increase the endometrial thickness, improve the ovarian function and improve the endometrial receptivity, the ovulation rate and the pregnancy rate. Therefore, the traditional Chinese medicine composition has important clinical significance and wide market application prospects.

The present invention discloses an additive for freezing liquid in a one-step method for bovine in vitro embryos and a one-step freezing method for bovine in vitro embryos, and belongs to the technical field of animal embryo cryopreservation and embryo transplantation. The additive of the present invention is an aqueous solution comprising sodium chloride, potassium chloride, magnesium chloride, disodium hydrogen phosphate, potassium dihydrogen phosphate, glucose, sodium pyruvate, calcium chloride, bovine serum albumin, sucrose, ethylene glycol and hyaluronic acid; the concentration of sucrose is 4.5 to 5.0 M. Based on the one-step freezing method for bovine in vitro embryos, the present invention increases the sucrose concentration in the conventional one-step freezing liquid and additionally adds hyaluronic acid, thereby increasing the osmotic pressure of the freezing liquid, facilitating the discharge of water inside the embryo, reducing the formation of ice crystals inside the embryo during the freezing process, reducing the damage to the embryo during the freezing process, and improving the survival rate, hatching rate and transplantation pregnancy rate of bovine in vitro embryos after freezing and thawing.

The invention relates to a freezing carrier device capable of absorbing embryo freezing fluid and application of the freezing carrier device. The freezing carrier device comprises a freezing pipe body, fluid-absorbing resin particles are adhered to the inner wall of the freezing pipe body through a polyurethane adhesive, tiny gaps exist between the fluid-absorbing resin particles, numerous micro-channels are formed, and a capillary effect is generated on the fluid. The liquid-absorbing resin particles used for absorbing the liquid can be polyacrylamide, sodium polyacrylate or a mixture of the polyacrylamide and the sodium polyacrylate. When the freezing carrier device is used, an embryo and a protective agent are mixed and then put into the freezing pipe body, and due to the liquid absorption performance (the hydrophilic effect of resin and the capillary effect of particle gaps) of the liquid absorption resin particle layer, the liquid absorption resin particle layer can rapidly absorb redundant embryo freezing liquid in embryo freezing liquid, so that the volume of the embryo freezing liquid is reduced, and the embryo freezing effect is improved. The freezing and unfreezing speed is increased, the damage of ice crystals to embryos is reduced, and the survival rate and conception rate of the embryos are increased.

The application discloses high-adhesion modified mesenchymal stem cells and application thereof in preparation of a medicine for treating intrauterine adhesion. The modified mesenchymal stem cells are genetically engineered to overexpress integrin alpha 2 subunit and / or integrin alpha 5 subunit, thereby enhancing the adhesion capacity to the extracellular matrix (collagen and fibronectin) of the endometrium. In vitro experiments show that the initial adhesion rate, liquid flushing resistance and anoikis resistance of the modified MSCs are significantly better than those of common MSCs. When used in combination with the "dynamic culture and drug delivery device for intrauterine adhesion treatment" applied by the inventor on the same day, the retention rate of the modified MSCs in the simulated intrauterine dynamic culture environment is significantly improved. Animal experiments show that the modified MSCs in combination with the device can significantly promote endometrial regeneration, inhibit fibrosis and improve the pregnancy rate. The application solves the core bottleneck of low cell retention rate and short survival time in the MSC transplantation treatment of intrauterine adhesion by enhancing the adhesion capacity of the MSCs, and forms a complete treatment scheme in cooperation with the device, thereby having a good clinical application prospect.

The sperm screening device is sequentially provided with a sperm sampling component, a first filtering component, a sperm screening component, a second filtering component and a sperm collecting component from bottom to top, a sperm storage cavity is formed in the top surface of the sperm sampling part, the sperm screening part is provided with a vertically-through mucus storage cavity, and the sperm collecting part is provided with a vertically-through culture medium storage cavity; the first filtering part is provided with a plurality of first through holes penetrating up and down, and the two ends of the first filtering part are in contact with the sperm storage cavity and the mucus storage cavity respectively; the second filtering part is provided with a plurality of second through holes penetrating up and down, and the two ends of the second filtering part are in contact with the mucus storage cavity and the sperm collecting part respectively. The invention further provides a screening method using the sperm screening device. According to the sperm screening device and the using method thereof, sperms with the ultralow DNA fragmentation rate can be screened out, and the pregnancy rate and the offspring quality can be improved.

The invention provides a method for increasing the early pregnancy rate of sheep, and belongs to the field of livestock breeding. According to the invention, beta-glucan is adopted to feed sheep. The specific steps of feeding sheep with beta-glucan are as follows: step 1, preparing a concentrated feed premix for ewes, mixing beta-glucan with the premix, the weight of beta-glucan being 0.2% of the weight of the premix; 2, feeding time: starting to add 0.2% of beta-glucan into the concentrated feed premix of the ewes on the ninth day after the ewes are subjected to estrus identification and the rams are bred, and feeding for 3 weeks, namely on the thirtieth day after breeding; on the 45th day after mating of the ewes, pregnancy diagnosis is carried out through B-mode ultrasound. The feed additive can improve the early pregnancy rate of the sheep, is low in cost, does not damage the vagina of the ewe, and does not cause hormone residue in the body of the ewe; at the same time, the embedded vagina suppository does not meet the requirement of animal welfare, and the used suppository is easy to cause environmental pollution. And the operation is simple.

The application discloses a one-step freezing solution for bovine in-vitro embryos and a one-step freezing method for bovine in-vitro embryos and belongs to the technical field of biotechnology.The method comprises the following steps: bovine oocyte in-vitro maturation; bovine in-vitro fertilization embryo production; after culturing the bovine in-vitro fertilization embryo for 6-8 days, the embryo is moved into freezing solution A, and after standing, the shriveled blastocyst is moved from the freezing solution A into freezing solution B, the embryo sinking to the bottom of the freezing solution B is moved into freezing solution C, is loaded into a macaroni tube, and is subjected to programmed freezing; after the freezing program is completed, the macaroni tube is put into liquid nitrogen. The bovine in-vitro embryos are frozen by using the three kinds of freezing solutions, on the premise that the conventional freezing method has low technical requirements for the operator and can be directly transplanted after thawing, the conventional freezing method is overcome, the survival rate, the hatching rate and the transplantation pregnancy rate of the embryos after thawing are low, the convenience of use and the effective integration of the high transplantation pregnancy rate are realized.

The invention relates to the field of medicines, in particular to application of FGF11 (fibroblast growth factor 11) in preparation of medicines for treating intrauterine adhesion. It is found for the first time that FGF11 preventive treatment can recover the damaged uterus form of an intrauterine adhesion rat, relieve the fibrosis level, promote proliferation of damaged endometrial epithelial cells and blood vessels and improve the pregnancy rate of an IUA rat. The mechanism may be that the damaged uterine fibrosis is inhibited through a TGF-beta1 / Smads signal channel, and the damaged endometrial function is recovered. Theoretical and experimental basis is provided for clinically applying FGF11 to treat intrauterine adhesion.

The invention relates to the field of probiotics, in particular to lactobacillus enteri LLM10, a probiotic complexing agent for promoting initial start of replacement gilts and oestrus of primiparous sows and application of the probiotic complexing agent. According to the present invention, the preservation number of the Lactobacillus enteri LLM10 is CGMCC No.26850, and the Lactobacillus enteri LLM10, the cinnamon powder and the Gorgon fruit powder are prepared into the complexing agent; the complexing agent can better enable the lactobacillus enteri LLM0 to be colonized in animal bodies, and has higher tolerance to artificial cholate, artificial gastric acid and artificial intestinal juice; particularly, hormone synthesis and secretion of the replacement gilts and the primiparous sows can be better improved, so that follicular development of the replacement gilts is improved, early starting of the replacement gilts is promoted, timely oestrus of the primiparous sows after weaning is promoted, the oestrus rate is increased, the pregnancy rate is increased, and the number of live piglets is increased.

This invention provides the application of lecithin in the preparation of drugs for the prevention and / or treatment of infertility, belonging to the field of biomedical preparation technology. Specifically, it relates to the application of lecithin in the preparation of drugs for the prevention and / or treatment of infertility, recurrent miscarriage, and / or uterine decidualization disorders. The lecithin can effectively reduce TNF-α levels in early pregnancy, improve uterine decidualization disorders, and increase endometrial receptivity, thereby increasing pregnancy rates and providing a new approach for the treatment of infertility and recurrent miscarriage.

The invention relates to the field of traditional Chinese medicine, and discloses a traditional Chinese medicine composition for treating spleen and kidney deficiency type male infertility and a preparation method and application thereof. The composition consists of a pharmaceutically acceptable carrier and active ingredients, the active component is prepared from the following components in parts by weight: 10 to 15 parts of fructus cnidii, 10 to 15 parts of rhizoma curculiginis, 10 to 15 parts of fructus psoraleae, 10 to 15 parts of herba epimedii, 10 to 15 parts of semen cuscutae, 10 to 15 parts of fructus lycii, 10 to 15 parts of fructus rosae laevigatae, 10 to 15 parts of fructus rubi, 10 to 15 parts of fructus ligustri lucidi, 10 to 15 parts of tortoise shell, 15 to 20 parts of herba taxilli, 10 to 15 parts of fructus schisandrae chinensis, 10 to 15 parts of rhizoma polygonati, 15 to 20 parts of semen plantaginis and 10 to 15 parts of semen citri reticulatae. The application can obviously improve the sperm quality of a patient, improve the testosterone level of serum and increase the natural pregnancy rate, and is good in safety.

The invention belongs to the technical field of biological medicine, and particularly relates to a monoclonal antibody for detecting or blocking FomA protein with fusobacterium nucleatum as well as application and a product of the monoclonal antibody. The monoclonal antibodies obtained through screening or antigen binding fragments FAMD6 and FAME67 of the monoclonal antibodies can be specifically combined with different sites of Fn-FomA protein, an immunodetection or diagnosis kit constructed by the monoclonal antibodies or the antigen binding fragments FAMD6 and FAME67 is high in sensitivity and specificity and can rapidly and accurately detect Fn infection, the detection sensitivity can reach 3.9 ng / mL, the highest dilution of Fn culture supernatant is 1: 1600, the sensitivity is high, and the Fn infection can be rapidly and accurately detected. Good application prospects are realized. Besides, in a mouse model, the monoclonal antibody or the antigen binding fragments FAMD6 and FAME67 thereof have higher protectiveness on pregnant mice, and the bad pregnancy rate can be effectively improved.

This invention discloses a mixed cell preparation and its application in the preparation of drugs for treating premature ovarian failure. The mixed cell preparation comprises granulosa cells and mesenchymal stem cells, mixed in a certain ratio (preferably 1:1). Granulosa cells are obtained by inducing differentiation from mesenchymal stem cells and express granulosa cell-specific markers (FOXL2, FSHR, etc.), participating in follicular structure reconstruction; mesenchymal stem cells can improve the ovarian microenvironment, inhibit inflammation, and resist fibrosis, providing a suitable "soil" for the survival of granulosa cells. In vitro experiments are expected to show that mixed culture can significantly increase estradiol secretion levels and cell survival rate. Animal models of premature ovarian failure are expected to show that mixed cell therapy can significantly restore the estrous cycle, improve hormone levels, increase the number of follicles at all stages, and improve pregnancy rates, with effects significantly superior to single-cell therapy. This invention utilizes the synergistic effect of the two cell types to achieve dual repair of the "seed" and the "soil," providing a novel treatment strategy for premature ovarian failure.

The application relates to a method for preserving animal sperm. The method uses an animal sperm liquid preservation diluent to preserve animal sperm; the animal sperm liquid preservation diluent is prepared by the following method: (1) mixing glucose, fructose, tris-hydroxymethyl aminomethane, citric acid and water to obtain a mixture 1; the mass-volume ratio of the glucose, fructose, tris-hydroxymethyl aminomethane, citric acid and water is (10-20) g:(10-20) g:(20-30) g:(10-20) g:(50-100) ml; (2) mixing edible mixed vegetable oil and the mixture 1 of step (1), stirring, and the volume ratio of the edible mixed vegetable oil and water is 50:(50-100) to obtain a mixture 2; standing, discarding the upper oil, refrigerating, and diluting with sterilized distilled water. The application has the advantages of wide application range, high pregnancy rate, long animal sperm liquid preservation time, good preservation activity and the like.

The invention discloses application of lycium barbarum red in treating male reproductive toxicity, and belongs to the technical field of biological medicine. The invention provides application of lycium barbarum red in preparation of a medicine for treating male reproductive toxicity. The male reproductive toxicity is caused by exposure to benzophenone substances or exposure to diethylstilbestrol. Animal experiments find that the lycium barbarum red can effectively improve testis function damage induced by benzophenone substance BP-3 or estrogen diethylstilbestrol, improve seminiferous tubule damage degree, increase seminiferous epithelium height, increase sperm number, spermatogonium and primary spermatoblasts, improve spermatogenic ability, increase pregnancy rate, improve sperm yield, improve sperm quality and improve sperm quality. The growth and development of offspring are promoted.

The invention discloses an application of FGF12 (Fibroblast Growth Factor 12) in a medicine for improving intrauterine adhesion. A 95% ethanol-induced intrauterine adhesion rat model is constructed, and an adeno-associated virus carrying an FGF12 gene is injected into a uterine cavity for intervention, which indicates that the FGF12 can significantly activate a Rho / ROCK signal channel, further promotes phosphorylation of myosin light chain subunits on myosin light chain phosphatase, inhibits dephosphorylation of MLC, and improves the phosphorylation level of MLC in fibroblasts. The endometrial fibrosis process is inhibited, collagen deposition is remarkably reduced, the endometrial thickness and the gland number are recovered, and the TGF-beta1 expression level is improved. Meanwhile, the pregnancy rate is obviously increased, and the limitation of traditional treatment is broken through.

The application provides a composition for treating infertility caused by polycystic ovary syndrome, which is composed of traditional Chinese medicines and western medicines. The traditional Chinese medicines are prepared from raw medicinal materials in the following proportions by weight: 5-13 parts of donkey-hide gelatin, 9-21 parts of prepared rehmannia, 5-13 parts of angelica, 9-21 parts of semen cuscutae, 5-13 parts of ligustrum lucidum ait, 5-13 parts of codonopsis pilosula, 5-13 parts of white atractylodes rhizome, 9-21 parts of polygonatum, 5-13 parts of rhizoma caryophylli, and 5-13 parts of chuanxiong. The western medicine is letrozole. The application also provides the use of the composition. The advantage of the application is that clinical and animal experiments have confirmed that the effect of letrozole combined with the traditional Chinese medicine decoction of the application on treating infertility caused by polycystic ovary syndrome is better, and the ovulation rate and pregnancy rate are significantly improved, so the application is worth promoting.

The invention belongs to the technical field of animal breeding, and particularly relates to application of alpha-ketoglutaric acid or salt thereof in preparation of a normal-temperature sheep semen preservation diluent. The invention discloses the application of alpha-ketoglutaric acid or salt thereof in normal-temperature preservation and / or dilution of the sheep semen for the first time, and the semen quality of the sheep semen during normal-temperature preservation and / or dilution can be improved by the alpha-ketoglutaric acid or salt thereof; such as sperm motility rate, sperm motility, sperm motility performance, sperm viability, sperm plasma membrane intact rate, sperm acrosome intact rate and / or artificial fertilization pregnancy rate, can be used for preparing the sheep sperm normal-temperature preservation diluent.

The present application relates to the technical field of pregnancy rate prediction, and particularly relates to a model establishment method and system for predicting pregnancy rate of early-onset ovarian dysfunction, which obtains clinical data of a patient, identifies four types of prediction key points, including basic physiological characteristics, ovarian reserve function, treatment intervention and pregnancy outcome correlation. When the total amount of key points exceeds a first threshold value, a dimensionality reduction improved feedforward neural network is constructed, and basic physiological characteristics and treatment intervention data are used as inputs to predict ovarian function and pregnancy outcome. When the number of key points is small, a graph neural network is used, a directed graph structure is constructed based on clustering and hierarchical relationship of each key point, and node state is dynamically updated based on basic physiological characteristics, so as to realize classification prediction of ovarian function and pregnancy risk, improve prediction accuracy and model interpretability, and provide personalized and intelligent decision support for fertility evaluation of POI patients.

The invention relates to the technical field of stock breeding, and discloses a high conception rate artificial insemination device based on low stress for Hu sheep and a method thereof.The high conception rate artificial insemination device comprises a sperm gun body and a support, a needle tube is fixedly connected to the front end of the sperm gun body, and a sound reflecting grating is arranged on an inner side pipeline of the needle tube through five-axis laser; a needle tube structure is arranged on the rear side of the sperm gun body and comprises a detachable tube; according to the low-stress-based high-conception-rate artificial insemination device and method for the Hu sheep, through the dual ultrasonic action of an IDT array on the inner wall of a cavity and a flexible piezoelectric sleeve on the inner wall, and cooperation of thermal disinfection of a heating layer and cooperation of a hydrogen peroxide sterilizer externally connected with a support, the outer surface of an instrument can be impacted through the ultrasonic liquid cavitation effect, and the high-conception-rate artificial insemination effect can be achieved; the oscillation intensity of gaps of the needle tube sound reflecting grating can be enhanced through the IDT array in the circumferential direction of the inner wall, a resistant biological membrane formed by burkholderia cepacia and pseudomonas aeruginosa is effectively stripped, the infection risk of the genital tract of the Hu sheep is reduced, and the conception rate is increased.

The invention belongs to the technical field of assisted reproduction, and particularly relates to a biomarker combination and a method for evaluating the failure risk of embryo implantation and early pregnancy of in-vitro assisted pregnancy patients. According to the method, the risk of embryo implantation failure is evaluated by detecting the oxidative stress marker concentration of an in-vitro pregnancy assisting patient at a specific time point. The multivariate logistic regression analysis proves that the increase of MDA, non-heme, 12-HETE and 15-HETE in serum is an independent risk factor of embryo implantation failure in the period; wherein the elevation of MDA and non-iron heme is a risk factor of occurrence of repeated implantation failure (RIF); the increase of MDA in uterine cavity fluid is an independent risk factor for early pregnancy failure. The invention provides a risk assessment method, which is characterized in that the concentration of the corresponding marker in the specific sample is detected, and the risk of the patient is assessed according to logistic regression analysis. The method has the advantages that high-risk patients can be recognized before transplantation, individualized diagnosis and treatment are achieved, and the accumulative pregnancy rate is increased.

The invention belongs to the field of veterinary drugs, and discloses a novel veterinary drug for promoting ovulation and pregnancy rate of female livestock and a preparation method thereof. The veterinary drug is prepared from gonadorelin, human chorionic gonadotropin, pregnant mare serum gonadotropin, vitamin A palmitate, vitamin E acetate, sodium selenite, zinc sulfate heptahydrate, herba epimedii powder, radix angelicae sinensis powder and corn starch. The preparation method comprises the key steps of performing cryogenic crushing on the composite traditional Chinese medicine powder, adding the fat-soluble vitamins through melt spraying, performing gradient mixing on hormones, performing vibrated fluidized bed drying and the like. Through the synergistic effect of hormones, vitamins, trace elements and traditional Chinese medicines, the problems of single ovulation promoting effect, limited pregnancy rate improvement and poor preparation stability in the prior art are effectively solved. Tests prove that the veterinary drug can remarkably improve the ovulation rate and pregnancy rate of cows, sows and ewes, and the veterinary drug is good in product uniformity, high in stability and convenient to use and has good clinical application prospects.

The invention discloses a high-quality embryo screening method based on embryo image and free RNA (cfRNA) multi-modal fusion, and belongs to the technical field of assisted reproduction. The method is based on a single embryo culture system and comprises the following steps: collecting a culture solution of a blastocyst-stage embryo and a corresponding embryo image and clinical information, obtaining molecular characteristics of cfRNA in the culture solution by adopting an ultramicro cfRNA sequencing library preparation technology, and extracting embryo morphology and time sequence dynamic characteristics in combination with a deep learning algorithm. And a multi-modal prediction model fusing molecule and image information is constructed, so that non-invasive accurate evaluation of embryo quality, pregnancy rate and live birth rate is realized. According to the method, the problems of high subjectivity, high invasive risk and insufficient prediction accuracy of traditional morphological evaluation are solved, the accuracy of high-quality embryo screening is improved through multi-modal information fusion, a safer and more efficient embryo evaluation scheme is provided for an assisted reproduction technology, and the method has important clinical application value.