Ovulation Induction with Gonadotropins 1.
Gonadotropins are the natural hormones that normally regulate ovarian function.
The pituitary is a small gland at the base of the brain. FSH stimulates follicular growth and estrogen production in the ovary and does so predominantly during the first half of the menstrual cycle, beginning with the menstrual period and ending with ovulation. A follicle is a collection of cells containing an egg, and it grows within a temporary ovarian cyst known as a follicular cyst. Once the follicular cyst reaches an adequate size, a surge in LH causes maturation and eventual rupture of the follicular cyst, usually around mid-cycle. However, the differences in clinical response to these drugs are subtle, and in most cases, they can be used interchangeably.