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SubjectsBiology
प्रसव और स्तनपान
In Class 12 Biology, this topic from Chapter 2: Human Reproduction explains how pregnancy culminates in parturition, or childbirth, through coordinated changes in the uterus, foetus and maternal hormones. Students learn about the roles of foetal signals, oxytocin and positive feedback in initiating and strengthening uterine contractions. The topic also covers lactation, including mammary gland function, prolactin and oxytocin, the production and release of milk, and the importance of colostrum and breastfeeding for the newborn’s early nutrition and immunity.
TOPIC PRACTICE
Up to 2 questions from this page. Select your focus, then start.
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.
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.
QUIZ COMPLETE
