Which reproductive pattern is characteristic of most ewes?
Correct answer: C. Short-day seasonal polyoestrous
- A. Long-day seasonal polyoestrous
- B. Non-seasonal monoestrous
- C. Short-day seasonal polyoestrous
- D. Continuous ovulation throughout life
Explanation
Most ewes are short-day seasonal polyoestrous animals, with reproductive activity increasing as day length decreases. This seasonal pattern is influenced by melatonin and the hypothalamic-pituitary-gonadal axis.
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About Theriogenology and Animal Reproduction
Covers the reproductive anatomy and physiology of male and female domestic animals, including puberty, oestrous cycles, ovulation, fertilisation, pregnancy, parturition and lactation. It also includes artificial insemination, semen evaluation, pregnancy diagnosis, infertility, dystocia and reproductive disorders, with attention to species differences.
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