Literature DB >> 7431285

Effect of PMSG on follicular atresia in the immature rat ovary.

R H Braw, A Tsafriri.   

Abstract

Administration of PMSG to 26-day-old rats did not increase the total number (non-atretic and atretic) of preantral (Type 4) and antral (Types 5 and 6) follicles but changed the proportion between non-atretic and atretic follicles. By 12 h after PMSG administration only 7% of Type 5 follicles were atretic, and no atretic follicles of Type 6 were observed, as compared to 52 and 62% atretic follicles, respectively, in the saline-treated controls. PMSG did not decrease the percentage of atresia in preantral (Type 4) follicles. The treatment was associated with a sharp fall by 12 h in the pyknotic index of antral (Types 5 and 6) follicles. It is concluded that PMSG causes superovulation in the rat by rescuing follicles of Types 5 and 6 from atresia and allowing them to reach ovulation.

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Year:  1980        PMID： 7431285     DOI： 10.1530/jrf.0.0590267

Source DB:  PubMed          Journal:  J Reprod Fertil        ISSN： 0022-4251


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