Menstrual cycle - controlling fertility

Hormones in the Menstrual Cycle

Oestrogen and Progesterone are the two main hormones, these two hormones control the main events of the cycle:

Oestrogen - causes the lining of the uterus to thicken and grow 
                - stimulates the release of an egg at day 14
Progesterone - maintains the lining of the uterus. -- when the level of progesterone falls, the lining breaks down.

Stage 1- Day 1 to Day 4- caused by the lack of Progesterone - lining of the uterus breaks down
Stage 2  Day 4 to Day 14 - caused by Oestrogen - lining of the uterus builds up.
Stage 3 Day 14 - caused by Oestrogen - egg released
Stage 4 Day 14 to Day 28 - caused by Progesterone - lining of uterus maintained

Female Hormones are used to Control Babies
To Stimulate Egg Production in fertility Treatment

When couples are trying to have babies and it doesn't seem to be happening, there are quite a few new fertility treatments that can be…