Preimplantation embryonic lethality 1

Maternal genes play a critical role in the very early stages of embryonic development because of the lag in transcribing genes derived from the male pronucleus. TLE6 mutations are a rare cause of human female-limited fertility and appear to represent the earliest known human embryonic lethality that is due to a single gene mutation. In affected women, ovulation proceeds normally and the retrieved oocytes appear normal, but zygote formation is severely impaired (Alazami et al., 2015). For a general phenotypic description and discussion of genetic heterogeneity of OZEMA, see 615774. [from OMIM]