The sperm sample is washed and concentrated, then added to the eggs a few hours after retrieval. The eggs are examined the next day for signs of fertilization. Not all of the eggs will fertilize, but we expect about 70-80% of the eggs to fertilize if the sperm sample looks normal. The fertilized eggs are kept in the incubator for an additional 48 hours. Not every follicle will contain an egg, not every egg will fertilize, and not every egg that fertilizes will go on to form a good quality embryo.
Now that your eggs have been removed from your ovaries, the next step is for the embryologist to prepare your eggs and your husband’s sperm for fertilization. In cases where the sperm cannot penetrate the egg because of low sperm count, abnormally shaped sperm or low motility, the embryologist will inject one sperm directly into each egg. This procedure is called Intracytoplasmic Sperm Injection or ICSI.
In vitro fertilization (IVF) is a process by which egg cells are fertilised by sperm outside the body, in vitro. IVF is a major treatment in infertility when other methods of assisted reproductive technology have failed. The process involves hormonally controlling the ovulatory process, removing ova (eggs) from the woman's ovaries and letting sperm fertilise them in a fluid medium. For More Detailed Information : IVF matters
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