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IVF: Ovulation induction

IVF:Ovulation induction

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If you’re using your own eggsduring IVF, at the start of a cycle you’ll begin treatment with synthetichormones to stimulate your ovaries to produce multiple eggs — rather than thesingle egg that normally develops each month. Multiple eggs are needed becausesome eggs won’t fertilize or develop normally after fertilization.

You may need several different medications,such as:

• Medications for ovarian stimulation.To stimulate your ovaries, you might receivean injectable medication containing a follicle-stimulating hormone (FSH),a luteinizing hormone (LH) or a combination of both. These medicationsstimulate more than one egg to develop at a time.
• Medications for oocyte maturation.When the follicles are ready for egg retrieval— generally after eight to 14 days — you will take human chorionicgonadotropin (HCG) or other medications to help the eggs mature.
• Medications to prevent prematureovulation.These medications prevent your bodyfrom releasing the developing eggs too soon.
• Medications toprepare the lining of your uterus.On theday of egg retrieval or at the time of embryo transfer, your doctor might recommend that you begin taking progesterone supplements tomake the lining of your uterus more receptive to implantation.

Your doctor will work with you todetermine which medications to use and when to use them.

Typically, you’ll need one to twoweeks of ovarian stimulation before your eggs are ready for retrieval. Todetermine when the eggs are ready for collection, your doctor will likelyperform:

• A vaginal ultrasound,an imaging exam of your ovaries to monitor thedevelopment of follicles — fluid-filled ovarian sacs where eggs mature
• Blood tests,to measure your response to ovarianstimulation medications — estrogen levels typically increase as folliclesdevelop and progesterone levels remain low until after ovulation

Sometimes IVF cycles need to be canceled beforeegg retrieval for one of these reasons:

• Inadequate number of follicles developing
• Premature ovulation
• Too many follicles developing, creating arisk of ovarian hyperstimulation syndrome
• Other medicalissues

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