This kind of assisted reproduction technique is usually availed by women who are above 35 and want to store their eggs for retrieval at a later point in life when they are ready to start a family. Egg freezing services are available at a fixed yearly charge and some labs use flash egg freezing while others use slow egg freezing technique.
Patients desirous of availing egg freezing services need to inform the IVF clinic a few weeks in advance as to when they want to undergo the surgical procedure for harvesting of mature eggs. There is a 21 day horizon from the beginning of the menstrual cycle when the ovaries are being readied for the stimulation phenomenon. Certain specific medications are administered to female patients in order to produce more eggs and ultrasound guided surgical needles are employed to harvest eggs from the ovary.
Eggs are in fluid form when they are extracted from the ovaries and they are then poured into a petri-dish and examined under a microscope. Water is removed from the eggs using advanced techniques and an anti-freeze solution is poured over them in order to ensure that ice-crystals do not form over them.
Thereafter these eggs are stored in liquid nitrogen tubes for a period that is defined in the consent form. And many years later when the patient wants to start a family, they are injected with a needle containing a single sperm. When the eggs are exposed to sperms, they develop into embryos which are then placed into the uterus by embryologists and carried to full term and subsequent delivery by the intended mother.