Consider the following :
A.   The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
B.   The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.

C.   The first polar body is associated with the formation of the primary oocyte.

D.   Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.

Choose the correct answer from the options given below:

We evaluate each statement one by one.

Statement A: “The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.”
In females, meiosis begins while the ovary is still in the fetal stage. Primary oocytes enter prophase I and become arrested. In males, spermatogenesis does not commence until puberty. Because the female process initiates during fetal life, it indeed starts earlier than the male process. Hence, statement A is true.

Statement B: “The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.”
In males, meiosis I and meiosis II occur consecutively without a prolonged pause; the two divisions are completed in a continuous sequence. In females, after the first meiotic division the oocyte arrests at metaphase II and remains in this state until fertilization, which may be years later. Therefore, the interval between the two divisions is indeed much shorter in males than in females. Thus, statement B is true.

Statement C: “The first polar body is associated with the formation of the primary oocyte.”
The primary oocyte is the cell that enters meiosis I. The first polar body is a by‑product of the first meiotic division, which separates the secondary oocyte from a small polar body. Consequently, the first polar body does **not** correspond to the formation of the primary oocyte. Statement C is false.

Statement D: “Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.”
The LH surge triggers ovulation—the release of the oocyte from the dominant follicle. Endometrial breakdown and menstrual bleeding occur later, when progesterone levels fall if fertilization has not taken place. Therefore, LH does not cause endometrial disintegration. Statement D is false.

Combining the evaluations, the true statements are A and B. The correct choice is “A and B are true.”