Cryopreserved Bovine Embryos Reveal Surprising Sex Differences, Challenging Assumptions
Male and female embryos respond differently to cryopreservation. The study found that the selection criteria for embryos can affect the male:female ratio. Bulls influence embryo production, development speed, and response to freezing. While male and female embryos look similar after vitrification, their gene expression levels differ. Female embryos show higher mRNA levels for certain genes compared to males.