SLC13A4 and polycystic ovary syndrome: As Slc13a4 encodes the most abundant sulfate transporter located in the syncytiotrophoblast, the Slc13a4 loss‐of‐function in mouse placentas led to fetal death.[50] These findings suggest that the mid‐gestation lethality in PCOS‐mice resulted from both transcriptional and epigenetic aberrations.