When and where are priamary oocytes formed in a human female ? Trace the development of these oocytes till ovulation (in menstrual cycle). How do gondotropins influence this developmental process ?

When and where are primary oocytes formed in human female? Trace the development of these oocytes till ovulation.

Explain the development of a secondary oocyte ( ovum) in a human female from the embryonic stage upto its ovulation. Name the hormones involved in this process.

(a) Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase. (b) Why is follicular phase in the menstrual cycle also referred as proliferative phase ? Explain. (c) Explain the events that occur in a graafian follicle at the time of ovulation and thereafter. ltbvrgt (d) Draw a graafian follicle and label antrum and secondary oocyte.

During the reproductive cycle of human female , when where and how does a placenta develop ? what is the function of placenta during pregnancy and embryo development ?