IVF Overview

In Vitro Fertilization is commonly referred to as IVF. IVF is the process of fertilization by manually combining an egg and sperm in a laboratory dish. When the IVF procedure is successful, the process is combined with a procedure known as embryo transfer, which is used to physically place the embryo in the uterus.

 

There are basically five steps in the IVF and embryo transfer process which include the following:

1. Monitor and stimulate the development of healthy egg(s) in the ovaries.
2. Collect the eggs.
3. Secure the sperm.
4. Combine the eggs and sperm together in the laboratory and provide the appropriate environment for fertilization and early embryo growth.
5. Transfer embryos into the uterus

Step 1: Fertility medications are prescribed to control the timing of the egg ripening and to increase the chance of collecting multiple eggs during one of the woman's cycles. This is often referred to as ovulation induction. Multiple eggs are desired because some eggs will not develop or fertilize after retrieval. Egg development is monitored using ultrasound to examine the ovaries and urine or blood test samples to check hormone levels.

Step 2: Your eggs are retrieved through a minor surgical procedure which uses ultrasound imaging to guide a hollow needle through the pelvic cavity. Sedation and local anesthesia are provided to remove any discomfort that you might experience. The eggs are removed from the ovaries using the hollow needle, which is called follicular aspiration. Some women may experience cramping on the day of retrieval, which usually subsides the following day; however, a feeling of fullness or pressure may last for several weeks following the procedure.

Step 3: Sperm, usually obtained by ejaculation is prepared for combining with the eggs.

Step 4: In a process called insemination, the sperm and eggs are placed in incubators located in the laboratory which enables fertilization to occur. In some cases where fertilization is suspected to be low, intracytoplasmic sperm injection (ICSI) may be used. Through this procedure, a single sperm is injected directly into the egg in an attempt to achieve fertilization. The eggs are monitored to confirm that fertilization and cell division are taking place. Once this occurs, the fertilized eggs are considered embryos.

Step 5:The embryos are usually transferred into the woman's uterus anywhere from two to six days later, but most commonly it occurs between three to five days following egg retrieval. We generally prefer day 5 transfer if possible. At this point, the fertilized egg is called as blastocyst, which has a greater chance of implantation and pregnancy.  The transfer process involves a speculum which is inserted into the vagina to expose the cervix. A predetermined number of embryos are suspended in fluid and gently placed through a catheter into the womb. This process is often guided by ultrasound. The procedure is usually painless, but some women may prefer anestezia.

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