Abstract
The production of cervical mucus by fertile and infertile ewes was examined as part of a study on ovine infertility in the agricultural regions of Western Australia. Infertile ewes produced a greater weight of mucus than did fertile ewes at both a synchronized and a natural oestrus. Following ovariectomy, however, both groups of ewes showed similar responses to exogenous oestrogen. The data indicate that the increased weight of mucus is indicative of the secretion of a thinner, more watery mucus.

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