July 31, 2008
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In Vitro Fertilization (IVF) which means ?fertilization in a glass? is often more commonly referred to as a test tube baby. Eggs are fertilized in a laboratory dish with sperm and then place inside the woman?s womb. Women who use In Vitro Fertilization are often recommended this method when others have failed or because they are older.
Although techniques for In Vitro Fertilization vary, a normal method of IVF would go something like this. At first your physician will halt the release of hormones that are produced during your monthly cycle by giving you some drugs. This will help them have improved control as to when your eggs will be produced. To ensure you ovaries produce more than a single egg, further drugs are given.
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It?s important that levels of estrogen produced by the eggs are monitored so a combination of blood tests and vaginal ultrasound scans are used. To help the eggs mature a different hormone will be injected once all the tests say the time is right. The timing for this injection is crucial and must be carried out no earlier that 34 or later than 38 hours before your eggs are collected. Collecting the eggs takes about 30 minutes and is carried out using ultrasound guidance so often either drugs or a general anesthetic is given to make you feel more relaxed.
It is not until this time that the man gets involved and needs to produce a sample of fresh sperm. This will be stored for a short time before the sperm are washed and spun at a high speed, so that the healthiest and most active can be selected. If you are using donated sperm, the sample is taken from the freezer and prepared in the same way. After the eggs and sperm have been collected they are left to mix in a laboratory dish for between 16 and 20 hours and then inspected to see whether fertilization has taken place. Any that haven?t, or any that have fertilized abnormally, are discarded and the remaining embryos are then left for another 24-48 hours before being checked again.
To ensure the womb is ready for the fertilized egg, two days after they have been collected, the womb lining is prepared by giving you pessaries, gel or an injection.
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