Shared donor oocyte system to determine if top embryos can be derived from oocyte factors or more likely from an oocyte/sperm interaction.
OBJECTIVE
To determine if top embryos require an unusual, and possibly fortuitous, combination of excellent oocyte quality and sperm, or whether some oocyte property alone leads to the formation of superior quality embryos on day 3.


METHODS
The embryo quality of donor oocyte recipient cycles was evaluated to find a woman who made 100% top embryos. After finding such an individual, the quality of the recipient's embryos was also evaluated. The shared donor oocyte recipient cycles were also evaluated for pregnancy outcome.


RESULTS
All 15 embryos were graded top. The six embryos transferred to the donor and recipient resulted in two sets of triplets. One of the fetuses of the recipient aborted related to trisomy 21.


CONCLUSIONS
The data indicates that the formation of an extremely high percentage (100%) of top embryos can be related to an oocyte factor. It is extremely unlikely to find two male partners who produce sperm with a unique property that makes superior morphologic embryos implant.
Horwath
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The University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School at Camden, Cooper Hospital/University Medical Center, Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology & Infertility, Camden, NJ, USA.
Check
J H
JH
Choe
J K
JK
Summers-Chase
D
D
Krotec
J W
JW
D000328:Adult; D004624:Embryo Transfer; D004622:Embryo, Mammalian / Q000502:physiology*; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000628:therapy; D008297:Male; D018587:Oocyte Donation / Q000379:methods*; D011247:Pregnancy; D011256:Pregnancy Outcome; D013094:Spermatozoa / Q000502:physiology; D014427:Twins