passages.id: split_4_test_2886_passage
passages.type: progene_text
passages.text: Here we report the effects of epidermal growth factor ( EGF ) on embryo implantation in the mouse , the expression and distribution patterns of EGF protein in the mouse blastocyst , ectoplacental cone ( EPC ) and peri - implantation uterus on days 1 - 8 of gestation.By RT - PCR and dot blot , we found that EGF and its receptor ( EGFR ) are co - expressed in the blastocyst and peri - implantational uteri of pregnant days 2-8 ( D2 - D8 ) mice .