Human Reproduction, Vol. 13, No. 10, 2970-2971,
October 1998
© 1998 European Society of Human Reproduction and Embryology
Case report: Live birth from a zygote cryopreserved for 8 years
Pennsylvania Reproductive Associates, Pennsylvania Hospital, Department of Obstetrics and Gynecology, 8th & Locust Streets, 7th Floor, Philadelphia, PA 19107, USA
Correspondence: To whom correspondence should be addressed
After a cryopreservation period of 8 years, four zygotes were thawed and transferred to the patient's uterine cavity. A singleton pregnancy resulted in the delivery of a normal male. This case report offers evidence that long terms of cryopreservation are consistent with full developmental potential post-thaw, and encourages further examination of imposing limits on length of storage of frozen concepti.
Key words: cryopreservation/embryo/regulation/storage
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