NEET (UG) 2025 — Question 129

Statement A is true: in human females, meiosis I (the reductive division) begins during fetal life, whereas in males it begins at puberty, so it starts earlier in females. Statement B is true: in males, the gap between meiosis I and meiosis II is short (spermatids quickly undergo meiosis II), while in females meiosis II is arrested at metaphase II until fertilization, so the gap is much shorter in males. Statement C is false: the first polar body is formed during the meiotic division of the primary oocyte (after meiosis I), not during the formation of the primary oocyte itself. Statement D is false: the LH surge triggers ovulation and formation of the corpus luteum; the disintegration of the endometrium and menstrual bleeding are caused by the decline in progesterone (and estrogen) at the end of the menstrual cycle. Thus, only A and B are true, so the correct answer is option A.