The menstrual cycle
The menstrual cycle is a cycle of approximately 28 days. It is process in which
the uterus lining builds up in anticipation of the arrival of an egg. If the egg is
not fertilized, the uterus is shed and released in blood through the vagina.
The main features of the cycle are
Day one – this is when the menstruation begins, the uterus lining is
breaking down and being removed in blood through the