The hormones of the cycle: who does what?
The cycle is driven by a dialogue between the brain (hypothalamus and pituitary) and the ovaries. The brain hormones, FSH and LH, stimulate the ovaries; the ovaries make oestrogen, which prepares ovulation, then progesterone, which prepares the uterus for pregnancy. Other glands play a part: the thyroid, the adrenals and the hormone prolactin.
A grain of sand at any level can disturb the whole: this is what we explore.




