This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by YING, S.-Y. Articles by MEYER, R. K. Search for Related Content PubMed Articles by YING, S.-Y. Articles by MEYER, R. K.

EFFECT OF PROGESTERONE ON INDUCED OVULATION IN IMMATURE RATS

Summary.: Female rats treated with 3 i.u. PMSG at 22 days of age yielded an average of five ova with approximately 80% ovulation. Treatment with progesterone at 22 or 23 days of age resulted in postponement or advancement of ovulation respectively. Time of progesterone injection and concentration and dosage of progesterone were investigated. One to four successive injections of progesterone produced 1 to 2 days' postponement of ovulation. The importance of the optimal oestrogen-progesterone ratio for ovulation is discussed.