PGS (PGT-A) success rates
Researchers in a 2022 study found no benefit in patients who used the ERA after transferring a single euploid, even when accounting for a history of failed transfers.
What’s the ideal follicle size for IVF? Researchers in a 2022 study compared follicle size at the time of trigger and related it to rates for egg maturity, fertilization, good quality embryos and euploidy. They also examined the association between follicle size and age and BMI.
Researchers in a 2022 study showed that extending embryo culture to day 7 increases the number of useable blastocysts, particularly for older women.
Researchers in a 2022 study reported on the outcomes of 144 “abnormal” embryos, consisting of aneuploids and mosaics, finding a single live birth with an aneuploid and more favorable results with mosaics.
Researchers in a 2021 study performed a clinical trial and found that low and moderate level mosaic embryos have comparable pregnancy outcomes to euploid embryo transfers.
Researchers in a 2020 study performed a clinical trial and transferred aneuploid embryos, finding that no whole chromosome aneuploids led to a live birth, while segmental aneuploids did.
Researchers in a 2021 study compared outcomes from 1,000 mosaic embryo transfers, consisting of high and low level, as well as whole chromosome or segmental mosaics.
Researchers in a 2019 study compared euploid transfer outcomes for day 5, 6 or 7 euploids, finding that day 7 embryos have good potential.
This post covers mosaic embryos, including their definition, frequency after PGT-A, mosaic embryo levels (low level, high level), mosaic embryo types (whole chromosome, segmental), current guidelines for transfer, potential for self-correction, and success rates.
This post covers PGT-A (formerly called PGS testing), including how it works, how accurate it is, whether it can damage embryos, how to read PGT-A reports, success rates, mosaic embryos, and why even euploid embryos sometimes fail.