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Pregnant mare's serum gonadotrophin. I. Progesterone or prolactin and the reversal of antifertility efficacy of pregnant mare's serum gonadotrophin

Pal, A.K.; Gupta, T.; Chatterjee, A.

Acta Endocrinologica 83(3): 506-511

1976

ISSN/ISBN: 0001-5598
PMID: 989993
Document Number: 105221
A single consistent luteolytic dose of 10 IU PMSG given on day 5 of pregnancy caused complete resorption of foetuses and placentae associated with a polyfollicular ovarian state in rats. Concomitant treatment with progesterone or prolactin given concurrently with PMSG was found to overcome the antifertility efficacy of PMSG and maintained the endocrine balance favouring pregnancy maintenance. It was postulated that the PMSG-induced ovarian polyfolliculogenesis might be responsible for luteolysis of the corpus luteum gravidarum.

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