qRT-PCR validation was performed for nine genes: three transcription factors involved in trophoblast differentiation, five differentially expressed target genes, and one housekeeping gene. The target genes were selected based on their placenta-specific or placenta-enriched expression, as revealed by earlier work [19 (link)]. Total RNA was reverse transcribed, and TaqMan assays (Table S10) were used for gene expression profiling on the Biomark high-throughput qRT-PCR system (Fluidigm, San Francisco, CA, USA).
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