| pubmed-article:819160 | pubmed:abstractText | A sensitive radioreceptorassay for human and animal gonadotropins made it possible to demonstrate and quantitate a Rat chorionic gonadotropin (rCG) in placental extracts and amniotic fluid. rCG appears as soon as day 8 and concentration is maximum at day 13 of gestation. This hormone might be the major ovarian stimulatory factor during mid gestation period. | lld:pubmed |
