Abstract

Embryonic trophectoderm (TE) cells play a key role in apposition, adhesion, and invasion of the maternal endometrium during early implantation. Blastocysts are morphologically graded (expansion stage (EXP); inner cell mass (ICM); trophectoderm (TE) cells) to better understand embryonic competence and improve selection at transfer. Data is scarce regarding the relationship of embryo TE quality and early levels of β-hCG, a biochemical marker of early embryo implantation and placentation. Previously, we demonstrated that embryo TE quality does not correlate with major adverse perinatal outcomes or placental weight at delivery.

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