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
Hormones play a key part within the menstrual cycle.
FSH – it is produced in the pituitary gland and it causes the egg to mature
and causes the ovaries to release oestrogen
Oestrogen – it stops FSH from being releases and causes the uterus
lining to thicken. Also stimulates the pituitary gland to
LH – causes the egg to be releases on day 14
Progesterone – it helps to maintain the lining of the uterus for the rest of
the menstrual cycle, if fertilization occurs then progesterone
levels remain high, if not then the progesterone levels fall
and the uterus lining breaks down.