The aim of this study was to examine the temporal relationships between FSH concentrations in blood and their effects on ovarian follicular viability, oestradiol synthesis and ovulation rates in Romney ewes. Collectively, the results showed that: (1) the number of non-atretic antral follicles (>/-1mm diameter) in sheep ovaries is influenced by plasma FSH concentrations; (2) the level of follicular oestradiol biosynthesis can be enhanced by FSH supplementation; and (3) sustained elevations of plasma FSH concentrations for 24 but not 6 h within 48 h of the onset of luteolysis significantly enhance the ovulation rate in Romney ewes.

GW, Montgomery

Proceedings of the New Zealand Society of Animal Production, Volume 45, , 43-48, 1985
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