Parturition and lactation

Correct answer: A. Parturition

Explanation: Parturition is the biological process of childbirth at the end of pregnancy. Near delivery, hormonal signals increase uterine contractility, and coordinated contractions of the uterus help expel the baby and then the placenta. Implantation is embryo attachment to the endometrium, oogenesis forms ova, and spermiation releases spermatozoa from seminiferous tubules. Hence, option A is correct.

Correct answer: A. Antibodies

Explanation: Colostrum is the first breast secretion produced around childbirth and during the early days after delivery. It is especially rich in antibodies, particularly secretory immunoglobulin A, which helps protect the newborn’s mucous membranes and digestive tract. Although colostrum contains nutrients such as lactose and fats, its distinctive importance is passive immune protection. Therefore, option A is correct.