When you ovulate, your body releases an egg from your ovary. The egg passes down the fallopian tube to your uterus. In order for a pregnancy to occur, a sperm must find its way into (fertilize) the egg. Then the fertilized egg implants into the wall of your uterus, and the pregnancy grows.
One way to improve the chances of a sperm fertilizing an egg is to use medication. The medication stimulates the ovaries to grow and release several eggs (follicles) at a time. The goal is to create multiple “targets” for the sperm to fertilize. There are two main types of medications used to stimulate the ovaries. There are oral medications (pills that you take by mouth) and inject able gonadotropin medications (shots you give yourself with a syringe).