Hormonal Regulation & Ovulation Patterns — NEET Biology
📚 Practice ConceptWhat is menstrual cycle? Which hormones regulate menstrual cycle? 18. What is parturition? Which hormones are involved in induction of parturition? 19. In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct? 20. How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal? 21. How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?
Which of the following statements concerning hormones involved in pregnancy and parturition are NOT correct? S1: Human placental lactogen (hPL) is secreted by the ovary and its levels decrease during pregnancy. S2: Increased levels of estrogens, progestogens, cortisol, prolactin, and thyroxine in maternal blood are essential for supporting fetal growth during pregnancy. S3: Oxytocin, released from the maternal pituitary, acts on uterine muscles to induce stronger uterine contractions during parturition. S4: Relaxin is secreted by the ovary in the later phase of pregnancy and directly induces the foetal ejection reflex. S5: The initial milk, colostrum, contains several antibodies crucial for developing resistance in newborn babies.
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