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The role of hormones
The main function of any hormone is to carry chemical messages from one tissue or organ to another tissue or organ in the body.
|  | Oestrogen
The main female sex hormone is oestrogen. It is synthesised in the ovarian tissue from a number of precursor hormones and plays many roles.
| | Progesterone
Progesterone works together with oestrogen to help regulate the menstrual cycle, as well as preparing a woman’s body for conception and the resulting pregnancy. Oestrogen and progesterone have a team work function when preparing the uterus for the coming embryo: oestrogen causes proliferation of the endometrium (“building the house”), and progesterone changes the proliferated endometrium into a secretory phase (“putting the furniture in”). |
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