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313results about How to "Improve pregnancy rate" patented technology

Antifreezer for diluting boar semen

InactiveCN101392236AObjective assessment of fertilization potentialProlong survival timeDead animal preservationTissue cultureSodium bicarbonateYolk
The invention relates to an antifreeze agent for diluting pig sperm, pertaining to the technical field of animal breeding. The antifreeze agent is prepared by N-acetyl-D-dextrosamine, hyaluronic acid, amido-sodium-lauryl sulfuric ester, glucose, trihydroxymethyl aminomethane, sodium citrate, sodium bicarbonate, potassium chloride, bactericide, distilled water and the like, wherein, the N-acetyl-D-dextrosamine can stimulate the emulsification function of the amido-sodium-lauryl sulfuric ester, enhances the protection function of the amido-sodium-lauryl sulfuric ester and yolk, the hyaluronic acid and the amido-sodium-lauryl sulfuric ester can effectively inhibit the damage rate of freezing and thawing sperm plasma membrane and DNA and improve the quality of freezing and thawing sperm, the glucose is the energy source for metabolism in vitro of the sperm, and the sodium citrate can maintain the osmotic pressure balance between diluted antifreeze agent environment and the internal environment of the sperm. The antifreeze agent for diluting pig sperm can effectively prolong the survival time of pig sperms for ultra-low temperature cryopreservation, and improve the liveliness of the freezing and thawing pig sperms, the integrity of plasma membrane and the integrity of acrosome.
Owner:SHANGHAI JIAO TONG UNIV

Rocking dynamic culture box

The invention discloses a rocking dynamic culture box. The rocking dynamic culture box comprises a box body, a sliding groove, a motor, a reciprocating motion mechanism and a motor speed adjusting device, wherein a tray is arranged in the box body; the sliding groove is formed below the tray; a sliding block matched with the sliding groove is arranged at the bottom of the tray and connected with the sliding groove in a sliding way; the sliding groove is supported by a bracket; the reciprocating motion mechanism comprises a crank and a connecting rod; one end of the connecting rod is connected with the sliding block; the other end of the connecting rod is connected with an output shaft of the motor through the crank; the motor drives the crank to rotate and pushes the sliding block to reciprocate in the sliding groove through the connecting rod; and the motor speed adjusting device is connected with the motor. According to the rocking dynamic culture box, the crank and connecting rod mechanism is driven by the motor to drive the tray to reciprocate with a low frequency in a small range, so that an oocyte or embryo for in-vitro culture is positioned in a dynamic culture environment, so as to simulate the rocking state of the oocyte or embryo in uterus. Therefore, the embryo development quality can be remarkably promoted and the later embryo implantation can be promoted, so as to increase the pregnancy rate.
Owner:NANJING GENERAL HOSPITAL NANJING MILLITARY COMMAND P L A

Sperm screening and in vitro fertilization bionic device based on micro fluidic technology

The invention provides a sperm screening and in vitro fertilization bionic device based on micro fluidic technology. The sperm screening and in vitro fertilization bionic device based on micro fluidic technology comprises a bionic device main body; the bionic device main body is composed of a glass sheet layer, a silica gel pipeline layer, and a polydimethylsiloxane layer; a center cell is arranged at the middle part of the silica gel pipeline layer; an inlet cell, a first outlet cell, and a second outlet cell are arranged outside the center cell; the center cell is communicated with the inlet cell, the first outlet cell, and the second outlet cell via a first pipeline, a second pipeline, and a third pipeline respectively; the first pipeline is provided with a first sample adding port; the second pipeline is provided with a second sample adding port; and the third pipeline is provided with a third sample adding port. The sperm screening and in vitro fertilization bionic device is used for stimulating complete natural impregnation process, unfavorable influences of operation on gametes and embryos are avoided, and polyspermy is avoided; high quality embryos at stimulated natural impregnation states can be obtained, in vitro fertilization success rate is increased greatly, the potential causes of sterility can be identified, and a direction is provided for clinical treatment.
Owner:NANJING JINGJING BIOTECHNOLOGY CO LTD

Method for inducing high-yield dairy cow to regularly ovulate and increasing conception rate

InactiveCN106137448APromote estrusOvercome the serious loss and other problemsAnimal reproductionMilk cow'sEmbryo
The invention provides a method for inducing a high-yield dairy cow to regularly ovulate and increasing the conception rate. The method includes the steps that 1, 35-40 days after the high-yield dairy cows calve, a progestational hormone device is embedded into a dairy cow vagina for the first time; 2, the progestational hormone device is taken out after being embedded for 14-16 days; 3, prostaglandin is injected; 4, 2 days after the prostaglandin is injected, an ovulation promoting hormone is injected; 5, 12-16 hours after the ovulation promoting hormone is injected, artificial insemination is carried out; 6, on the sixth to eighth day after artificial insemination, the progestational hormone device is embedded again, and the further embedding time ranges from 14-16 days. According to the method, the development and ovulation time of follicles in the ovary of the dairy cow can be regulated, detection of oestrus is not needed, artificial insemination is directly carried out, fetus protection medicine is adopted, and the survival rate of embryos is increased. The defects that oestrus of the high-yield dairy cow is not easy to observe is overcome, the oestrus rate and the conception rate of the dairy cow can be increased, the calving interval of the high-yield dairy cow is shortened, breeding benefits of the high-yield dairy cow are increased, and production management of a dairy cow farm is convenient.
Owner:HEBEI UNIV OF ENG

Intelligent system and control method for animal body temperature acquisition and estrus monitoring

The invention relates to an intelligent system and control method for animal body temperature acquisition and estrus monitoring. The intelligent system for animal body temperature acquisition and estrus monitoring comprises an intelligent body temperature acquisition and RFID device, an acquisition base station, a background server and a estrus monitoring station; the intelligent body temperatureacquisition and RFID device includes a high-sensitivity internal body temperature sensor module, a high-sensitivity shell temperature sensor module, a single-chip microcomputer module, a built-in battery module and a wireless communication module; the high-sensitivity internal body temperature sensor module and the high-sensitivity shell temperature sensor transmit ADC data to the single-chip microcomputer module; the single-chip microcomputer module transmits processed data to the acquisition base station through a wireless transmission protocol; the acquisition base station actively reportsthe data to the background server; and a user can conveniently grasp the body temperature condition of an animal through a mobile phone or a computer. With the intelligent system and control method ofthe invention adopted, animal farm management staff can grasp the temperature of each animal, whether the animals are in estruses, and other conditions timely and easily, so that the staff can isolate and treat animals that may have problems in advance; animals in estruses can be know according to data, so that the chance of conception of the animals can be improved, and therefore, the efficiencyof a breeding plant can be improved.
Owner:北京牧江科技有限公司

Timely artificial insemination method for giant panda

The invention discloses a timely artificial insemination method for a giant panda. The method comprises the steps of: collecting, testing and analyzing urine samples of female giant pandas during oestrus in spring, simultaneously combining with these circumstances such as time that the drop of an estradiol maximal peak value or an estradiol peak value reaches up to over 50%, the condition whether a progesterone value is on the rise and the giant panda generates a typical heat peak behavior in the process of the estradiol dropping from the maximal peak value or subsequent peak value, and the ratio of the progesterone value corresponding to the estradiol maximal peak value or subsequent estradiol peak value to the progesterone basic value, judging a real peak value of the estradiol of the giant panda; then carrying out artificial insemination for the first time within 24-48 hours after the moment when the estradiol real peak value appears, and carrying out artificial insemination for the second time after 6-8 hours after finishing the artificial insemination for the second time, finally obviously improving the pregnancy rate of the giant panda. Compared with the past, the artificial insemination pregnancy rate of the giant panda is improved to 42.11% from 20.41% and is more than doubled.
Owner:CHENGDU RES BASE OF GIANT PANDA BREEDING
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