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Gene expression is differently governed before and after blastocyst attachment. Gene regulatory systems were predicted in Enrichr by comparing our data and publicly available datasets. Genes expressed on days 3 and 4 (A) are progesterone receptor (Pgr)‐related, while the day 5 epithelium expresses the genes regulated by PRC2 and the trimethylation of histone H3 at lysine 27 (H3K27me3) (B)
