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The hormonal control of ovulation in the immature lamb

Published online by Cambridge University Press:  27 March 2009

A. M. Mansour
A. M. Mansour
Affiliation:
School of Agriculture, University of Cambridge and Animal and Poultry Breeding Institute, Ministry of Agriculture, Dokki, Egypt
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Extract

1. Thirty-four lambs varying from 1 week old up to 22 weeks have been treated with: (a) p.m.s. alone; (b) Progesterone + p.m.s.; (c) p.m.s. + chorionic gonadotrophin (c.g.).

2. At 1 week old the lamb's ovaries were unresponsive to treatment (a).

3. At 4 weeks follicular growth was obtained in groups treated with both (a) and (b).

4. At 8 weeks of age follicular stimulation was obtained from treatment (a), follicle luteinization from (b), and ovulation from (c).

5. At 10 weeks luteinization was observed in (b) and ovulation in (c).

6. At 12 weeks luteinization occurred following treatment (a) and ovulation followed treatments (b) and (c).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 52 , Issue 1 , February 1959 , pp. 87 - 94
Copyright
Copyright © Cambridge University Press 1959

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