The menstrual cycle prepares the uterus for a fertilized egg. How long is an average menstrual cycle from start to finish? (AS1)

a) An average menstrual cycle extends between a period of 28-30 days from the onset of puberty in girls.

b) It starts with the end of the previous menstruation.

c) One of the ovaries develop an egg and release it on the 14^th day. This process is called ovulation.

d) The uterus prepares itself for receiving a zygote if fertilization takes place.

e) The walls of the uterus get thick and richly supplied with blood vessels. The uterus also increases in its size.

f) If the egg is not fertilized between the 14^th-18^th day, the egg is shed off the body.

g) As there is no use of the uterine lining, it too comes off the vagina around 28^th day in the form of menstrual flow.