In cattle, what is the principal reproductive effect of prostaglandin F2 alpha when a functional corpus luteum is present?
Correct answer: D. It causes luteolysis and permits a new cycle
- A. It causes ovulation of every follicle
- B. It permanently suppresses ovarian activity
- C. It maintains pregnancy by increasing progesterone
- D. It causes luteolysis and permits a new cycle
Explanation
Prostaglandin F2 alpha regresses a responsive corpus luteum, causing progesterone to fall and allowing the next oestrous cycle to begin. It is therefore useful in selected oestrus-synchronisation programmes.
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