4 results about "Estetrol" patented technology

Estetrol (E4), or oestetrol, is a weak estrogen steroid hormone which is found in detectable levels only during pregnancy. It is produced exclusively by the fetal liver. Estetrol is closely related to estriol, which is also a weak estrogen that is found in high quantities only during pregnancy. Along with estradiol (E2), estrone (E1), and estriol (E3), estetrol is a major estrogen in the body, although only during pregnancy.