At which stage of life is the oogenesis process initiated?

What is the name of the oocyte present in the primary and secondary follicles?

Which hormone of the pituitary gland regulates the Sertoli cells?

Spermiogenesis is under the control of which hormone?

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
$(a)$ It results in the formation of haploid gametes
$(b)$ Differentiation of gamete occurs after the completion of meiosis
$(c)$ Meiosis occurs continuously in a mitotically dividing stem cell population
$(d)$ It is controlled by the Luteinising hormone $(LH)$ and Follicle-Stimulating Hormone $(FSH)$ secreted by the anterior pituitary
$(e)$ It is initiated at puberty
Choose the most appropriate answer from the options given below:

The formation of a polar body occurs during the formation of which of the following?