Question

most embryonic deaths in pigs occur: a) during ovulation b) in the first 30-35 days of gestation c) at 60-90 days of gestation d) just before farrowing only

Explanation:

Embryonic deaths in pigs are a significant concern in swine reproduction. Ovulation (a) is the release of eggs and not a stage of embryonic development. 60 - 90 days (c) is later in gestation when the embryo is more developed. Just before farrowing (d) is about fetal survival near birth, not embryonic. The first 30 - 35 days (b) is a critical period for embryonic implantation, development, and survival. Many factors like hormonal imbalances, uterine environment, and genetic issues can lead to deaths during this early stage.

Answer:

B. In the first 30–35 days of gestation