How does the 38-week pregnancy in humans compare to the development of young at birth in other mammals, particularly in terms of size and gestation period?
1 AnswerHow does positive feedback involving estrogen and oxytocin mediate birth?
1 AnswerHow do estrogen and progesterone secreted by the placenta support pregnancy once it has formed?
1 AnswerHow does the placenta facilitate the exchange of materials between the mother and fetus, and what are some examples of substances exchanged?
1 AnswerHow does HCG (human chorionic gonadotropin) stimulate the ovary to secrete progesterone during early pregnancy?
1 AnswerWhy is the implantation of the blastocyst in the endometrium crucial for the continuation of pregnancy?
1 AnswerWhat mechanisms are involved in preventing polyspermy during fertilization, and why is this important for successful embryo development?
1 AnswerWhat are the key differences between internal and external fertilization in animals, and how do these methods ensure successful reproduction?
1 AnswerIn what ways do spermatogenesis and oogenesis differ in terms of the number of gametes produced and the distribution of cytoplasm?
1 AnswerHow do spermatogenesis and oogenesis both involve mitosis, cell growth, two divisions of meiosis, and differentiation?
1 AnswerSourav PanSourav PanSourav Pan
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