Stopped: Preliminary findings of inconsistent embryo grading across sites.
Background: Advanced maternal age (AMA) is associated with a reduction in live birth rate (LBR) after ART cycles. The main reason for this reduction is the lower number of oocytes aspirated, the number of developing embryos and the low number of euploid embryos available for transfer. The impact of age on success rates after the transfer of an euploid embryo has been a matter of discussion, with a recent meta-analysis showing a reduction in LBR after the transfer of an euploid blastocyst to women of AMA (1). There could be many reasons for this reduced LBR but they can be categorized into two broad categories - the uterus (including the mother's health) and the embryo (including the oocyte and the sperm). It is possible that factors associated with reduced embryo quality would manifest in a lower embryo grade.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Embryo Grade
Timeframe: 6 months