An interventional study of Non-euploid embryo transfer and Euploid Transfer in Aneuploidy, Mosaicism and Pregnancy Outcome, sponsored by Stanford University. Recruiting at 1 site in United States. Open to female participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-04-24.
Sponsored by Stanford University · Not applicable, Interventional, and Treatment
To determine how often embryos reported to be abnormal by preimplantation genetic testing result in liveborn infants. To evaluate whether the pregnancies that result from these embryos are higher risk for complications and whether the resulting babies have higher risk for health or developmental issues in the first five years after birth.
Genetic testing modality and results will be recorded
Pregnancy per transfer will be recorded
Patients in the study agree to provide medical records of their pregnancy.
Any genetic testing or fetal testing will be carefully reviewed and recorded by the study team.
For patients with live births, pediatric records will be collected for up to 5 years.
As well as surveys for developmental milestones.
There is no financial compensation for study participants
73 studies on the registry are indexed under Aneuploidy; 10 are open to participants now.
This study's planned enrollment of 300 is above the median of 200 across 34 interventional studies indexed under Aneuploidy.
Browse Aneuploidy studies →Stanford University is the lead sponsor of 2,168 studies on the registry; 431 are open to participants now.
Of its 267 completed or terminated interventional studies of FDA-regulated products, 207 (78%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Patients desiring pregnancy who have no acceptable euploid embryos available for transfer who chose to undergo embryo transfer of a non-euploid embryo (either aneuploid or mosaic).
Other: Non-euploid embryo transfer
Patients desiring pregnancy who are undergoing euploid embryo transfer
Other: Euploid Transfer
Other than choice of embryo for transfer, all other medical interventions will be standard of care protocols
Standard of Care Protocol
Pregnancy Rate
Number participants who undergo embryo transfers that lead to a positive pregnancy test
Time frame: 3 years
Live birth rate
Number participants who conceive after embryo transfer and have a live birth.
Time frame: 4 years
Obstetric complications
Number of participants who have a maternal of fetal complication after embryo transfer
Time frame: 4 years
Pediatric Development
Number of newborns and children who have abnormal pediatric development at 3 months, 2 years and 5 years following birth
Time frame: 7 years 3 months
Plan to share: No — Data will only reported in aggregate
Started Apr 2019 (actual). Primary completion is estimated for Apr 2035, 192 months after the start.
Of 19 interventional studies with no phase under Aneuploidy, half reached primary completion within 31 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 49. This study's planned 192 months is above that.
How these figures are worked out, and which studies are left out of them.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
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