An intact embryo‐maternal communication is critical for the establishment of a successful
pregnancy. To date, a huge number of studies have been performed describing the complex
process of embryo‐maternal signaling within the uterus. However, recent studies indicate
that the early embryo communicates with the oviductal cells shortly after fertilizationand that
this is important for the successful establishment of pregnancy. Only if the early embryo is
capable to signal the mother within a precise timeframe and to garner a response, will the …