Fig. 3

Genotype- and allele-specific DNA methylation levels at H19 ICR (CTCF6) in control and ART placentas measured by traditional bisulfite sequencing. Methylation levels of selected CpG sites in the a patG/matA genotype, b paternal allele of patG/matA genotype, c maternal allele of patG/matA genotype, d patA/matG genotype, e paternal allele of patA/matG genotype, and f maternal allele of patA/matG genotype. Error bars denote the SD. The numbers of samples are in brackets. A star (★) illustrates nominal P value < 0.05, Mann–Whitney