When a female child is born, her ovaries already contain thousands of immature eggs (or ova) contained in immature structures A. On maturing, A bursts open and and egg shoots cut of the ovary in a process called B. The process B starts in the female after a time period x. Before every occurrence of process B, the inner lining of uterus becomes thick and soft with lots of blood vessels in it. When the egg cell gets fertilized by a sperm, then an event C occurs in the life of mature human female which lasts for time period y leading to the birth of baby. If however, the egg cell released by the ovary does not get a sperm to fuse with, then the thick and soft inner lining of uterus breaks down and comes out of the female's body in an event called D. The occurrence of event D is controlled by chemical substances E.
(a) What are A?
(b) What is process B ?
(c) What is the time period x?
(d) Name the event C.
(e) How much is the period y ?
(f) What is the name of process D?
(g) Name the chemical substances E.

Answer

(a) Follicles (b) Ovulation (c) 28 days (d) Conception (or Pregnancy) (e) About nine months (f) Menstruation (g) Hormones