Corifollitropin alfa (rch) is a gonadotrophin hormone (that is, a reproductive hormone) used in medications that are given as part of assisted reproduction. It is very similar to a hormone called follicle stimulating hormone (FSH), which is produced naturally in a woman’s body and causes her eggs to mature and be released from the ovaries (ovulation) during the menstrual cycle.

Corifollitropin alfa (rch) acts in the same way as FSH, but works for longer (for about seven days, as opposed to one day). It is the active ingredient in a medication called Elonva.

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