Ganirelix

How it works

Daily IVF shots that occupy the pituitary's GnRH receptor without firing it, holding back LH, the hormone that triggers ovulation.

What it's made of

10 amino acids: GnRH with six positions changed, among them D-amino acids and two lengthened arginines. Cetrorelix's twin: it blocks the receptor without activating it.

What it's for

Prescribed for

Preventing the premature LH surge in women undergoing controlled ovarian stimulation.