In canine pyometra, the uterus is usually affected during a period dominated by:
Correct answer: B. Progesterone during the luteal phase
- A. Oestrogen after follicular growth
- B. Progesterone during the luteal phase
- C. Oxytocin during cervical relaxation
- D. Prostaglandin during follicular atresia
Explanation
Pyometra commonly develops during progesterone-dominated diestrus, when uterine glandular secretion and reduced uterine defence favour bacterial growth. Oestrogen alone does not produce the typical uterine environment of pyometra.
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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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