Steps in the IVF process

Step two: follicle suppression

Most IVF clinics control the woman's natural ovulation pattern by using drugs called GnRH analogues (gonadotrophin releasing hormone). There are two categories of GnRH analogues (GnRH-a): GnRH agonists and GnRH antagonists.  Your doctor will choose the drug that is appropriate for your situation.

GnRH analogues prevent your ovaries from releasing eggs too early during the cycle. This is called follicle suppression. Note that follicles are the sacs in your ovaries that contain the eggs.

These suppression drugs are usually given for about two weeks, although the timing may vary depending on how you respond. GnRH analogues are usually administered through a nose spray or an injection.

Are you scared of needles?

Possible side effects of GnRH analogues given during an IVF cycle:

• Hot flashes

• Headaches

• Vaginal dryness

• Mood changes

• Stuffiness

• Redness, pain or irritation from the injection

Some of these side effects can be eased through medication. If you are bothered by uncomfortable side effects, call your doctor. Keep in mind, however, that most of these side effects diminish once the next step of the process begins.