During the first stage of parturition, the principal observable event is which of the following?
Correct answer: B. Cervical dilation with uterine contractions
- A. Complete expulsion of the placenta
- B. Cervical dilation with uterine contractions
- C. Delivery of the fetus through the birth canal
- D. Involution of the uterus after delivery
Explanation
The first stage involves cervical dilation and increasingly coordinated uterine contractions. Fetal expulsion occurs in the second stage, and placental expulsion occurs in the third stage.
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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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