The electromagnetic smog created by the increased number of electronic devices affects living organisms. In the current study, we documented significant changes induced by the extremely low-frequency electromagnetic field (ELF-EMF) in pig endometrial DNA methylation levels during the peri-implantation period. We assume that ELF-EMF affects the level of DNA methylation in the endometrium, which may lead to changes in implantation.

Plasmalogens have important roles in the physiological functioning of mothers and breastfeeding infants, and have novel roles in stimulating gonadotrophs. In Holstein dairy cows, the plasma concentrations of ether phospholipids, most of which are plasmalogens, dramatically changed around parturition and around the day of the first postpartum ovulation, and the concentrations correlated with important parameters for milk production and reproduction. Blood plasmalogen may play important roles in postpartum dairy cows.