Survival of Embryos Transferred Into the Iud-Bearing Uterus of the Rat

Abstract

Summary. An IUD is thought to exert a contraceptive effect either by (1) inducing the premature expulsion ofembryos, (2)

In-vitro development of preimplantation embryos recovered from IUD-bearing mice

“…These observations indicated that PMNLs may be actively involved in the prevention of implantation in mice bearing an IUD. In other species, however, PMNLs are less evident, and it has been suggested that the acellular luminal contents might be embryotoxic (Parr, Schaedler & Hirsch, 1967;De Boer & Anderson, 1971;Smith, El Sahwi, Wilson & Moyer, 1971; see also Moyer, Shaw & Fu, 1976), thereby rendering embryos in some way abnormal before coming into contact with PMNLs.…”