Gonadotrophins – FSH or a combination of FSH/LH (Gonal F, Humegon, Puregon, Menagon)

This injection does the job done by FSH in the normal cycle. It acts on the ovary and stimulates follicles to start growing and then continue growing. The selection of number of follicles to start growing is called “recruitment”. FSH is needed for this as well as the increase in size which is called follicular growth. Follicle is seen as dark circular spaces and that is because of the fluid in the follicle which appears dark on ultrasound scans. The egg is growing within the follicle and there is a rough correlation between the size of the follicle and the maturity of the egg. The FSH dose is increased to reduce the based on the speed of the growth of the follicles. FSH injection is typically stopped on the day we give the hCG “trigger”.