Topics:
Animal Refresher, Animal Reproduction
Characteristic of the Second Stage of Parturition
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Question (English)
The second stage of parturition is characterized by:
- Dilation of the cervix
- Involution of uterus
- Expulsion of foetal membranes
- Delivery of the newborn ✓ Correct
Explanation:
Correct Answer: Delivery of the newborn
The second stage of parturition is characterized by the actual delivery of the newborn (birth). It begins with full cervical dilation and complete rupture of the chorioallantois, and ends with expulsion of the foetus.
The Three Stages of Parturition
- Stage 1 (Preparatory stage): Dilation of the cervix; beginning of uterine contractions; chorionic sac rupture; lasts 2–6 hours in cattle
- Stage 2 (Expulsion stage): Delivery of the newborn ✔; strong abdominal straining; lasts 0.5–1 hour in cattle
- Stage 3 (Cleansing stage): Expulsion of foetal membranes (placenta/afterbirth) + involution of uterus; lasts 6–12 hours in cattle
Retained Foetal Membranes (RFM)
If foetal membranes are not expelled within 12 hours in cattle (24 hours in mares), it is considered RFM — a common post-parturient complication requiring veterinary intervention.
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This multiple choice question is from Animal Refresher, Animal Reproduction. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
