Abstract
Aspects of ovarian follicular development in goats differ from those of cattle and sheep. This review aims to highlight these characteristics. As in cows and ewes, follicular development occurs in a wave-like pattern. As many as 6 and 7 follicular waves had been reported in does; higher than in mare, cow and ewe. Furthermore, more than one preovulatory dominant follicle could be found on the ovary (co-dominance). The number of follicular waves, the number of follicles, plasma insulin-like growth factor 1 (IGF-1) and corpora lutea diameter, were not significantly different in prostaglandin F2α (PGF2α), progesterone oestrus synchronised and in naturally cycling does. The morphology and progesterone secreting properties of PGF2α oestrus synchronised and naturally cycling goats were different. The reason for higher number of follicular waves and the mechanism of follicular co-dominance in does is yet to be elucidated fully.
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