Which hormone is most directly responsible for milk ejection during suckling in domestic mammals?
Correct answer: D. Oxytocin
- A. Prolactin
- B. Oestrogen
- C. Progesterone
- D. Oxytocin
Explanation
Suckling stimulates oxytocin release, causing contraction of myoepithelial cells around the mammary alveoli and milk ejection. Prolactin supports milk synthesis, but it does not produce the main milk let-down response.
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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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