OVULATION INDUCED BY GONADOTROPHINS IN THE MARSUPIAL, SMINTHOPSIS CRASSICAUDATA (GOULD)

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Authors:
MEREDITH J. SMITH
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and
GILLIAN K. GODFREY
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DOI:
https://doi.org/10.1530/jrf.0.0220041
Volume/Issue:
Volume 22: Issue 1
Page Range:
41–47
Article Type:
Research Article
Online Publication Date:
Jun 1970
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Summary.

Injection of hcg into mature, female S. crassicaudata induced ovulation in three of six animals, whereas injection of pmsg or of pmsg followed after 48 hr by hcg induced ovulation in all of seventeen females. Seven mated but none littered.

Ten adult females were injected with pmsg and hcg at the end of an induced oestrous cycle, when the corpora lutea were degenerate. Six mated but none littered. Of eight young females injected with pmsg and hcg, four mated but again none littered. All ova recovered after induced ovulation were unfertilized.

The number of ova released at induced ovulation was higher than in untreated animals and many unruptured follicles became luteinized. Ova were retained in the oviducts for longer than normal.

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Print ISSN:
1470-1626
Online ISSN:
1741-7899