In vitro fertilization (IVF) is an advanced technology process that involves the retrieval of mature eggs from a woman’s ovaries so that they can be combined with sperm in a laboratory. The resulting embryos are transferred into the uterus and IVF is preferred for a woman who is
> age of 30 and more
> Have fallopian tubes with structural issues
> Have severe cases of endometriosis
> Have experienced several failed ovarian stimulation with IUI cycles in the past
In the initial step of IVF, medications are used to stimulate the egg follicles contained within the ovaries. In a normal menstruation cycle, one follicle develops one egg, which is released through the fallopian tubes. In IVF, fertility medications trigger multiple follicles to mature several eggs at once. The eggs are then retrieved using a vaginal ultrasound and an aspirating needle. By developing and retrieving multiple eggs at once, there is a greater chance of fertilization and implantation of a viable embryo.
Once retrieved, the eggs are combined with sperm in a petri dish so that fertilization can occur naturally. If successful, the resulting embryo is allowed to develop over a few days.
In a fresh embryo transfer, the embryo is implanted into the uterus three to five days after fertilization. In frozen embryo transfer, the embryo is frozen instead of being transferred immediately. Using a rapid freezing process known as vitrification, the embryo is flash-frozen into a glass-like structure. Embryos can remain in this frozen stasis for an indefinite period.