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Oocyte cryopreservation is a procedure to preserve a woman's eggs . The technique is often used to delay pregnancy . At the time pregnancy is desired, the eggs can be thawed, fertilized, and transferred to the uterus as embryos .
Transvaginal oocyte retrieval is more properly referred to as transvaginal ovum retrieval when the oocytes have matured into ova, as is normally the case in IVF. It can be also performed for egg donation , oocyte cryopreservation and other assisted reproduction technology such as ICSI .
The immature oocytes are retrieved from the artificial ovary and cultured in vitro for a further 24–48 hours, allowing them to mature oocytes which are ready for IVF or vitrification (cryopreservation). [7]
Tissue can then be thawed and implanted near the fallopian, either orthotopic (on the natural location) or heterotopic (on the abdominal wall), [2] where it starts to produce new eggs, allowing normal conception to take place. [4] A study of 60 procedures concluded that ovarian tissue harvesting appears to be safe. [2]
The same study found that, of 65 patients referred to the program, 28% declined to undergo embryo, oocyte, or tissue cryopreservation. 9% were found not to be eligible for medical reasons. Of the remaining 41 patients, 85% chose to cryopreserve embryos, 10% chose to cryopreserve oocytes, and 5% chose to undergo ovarian tissue freezing. [9]
Health insurance costs are a major factor in access to health coverage in the United States. The rising cost of health insurance leads more consumers to go without coverage [1] and increase in insurance cost and accompanying rise in the cost of health care expenses has led health insurers to provide more policies with higher deductibles and other limitations that require the consumer to pay a ...
The cryopreservation of embryos was first successfully attempted in 1984 in the case of Zoe Leyland, the first baby to be born from a frozen embryo. [16] In Zoe's case, the embryo had been frozen for two months, but since the inception of the practice of cryopreservation after successful IVF, embryos have successfully survived in ...
Of these primordial follicles, only around 400 mature oocytes are released and could be potentially fertilised, with the rest undergoing atresia. [7] 'Maturation' of an oocyte is the process by which an 'oocyte attains the competence to be fertilised and undergo embryogenesis'. [8] Folliculogenesis is the mechanism by which the ovarian ...