Medical Memoranda BRrT= 97 She made an uneventful postoperative recovery, and when seen in the outpatient department four months later was well and menstruation had returned to normal. Histology.-By comparison with placentae belonging to embryos of known size the histology corresponds most closely to those of 10 to 15-mm. (37 to 42-day) embryos as regards the characteristics of the cytotrophobl...

The main variables that affect nidation are related to uterine receptivity, embryo quality and the efficiency of embryo transfer. Embryo transfer is the critical step in assisted reproductive technology; with rigid catheters, contamination with blood, mucus or bacteria, increased contraction waves of the myometrium, and the level of difficulty in introducing the catheter inside the uterine cavi...

Recently, there has been a growing controversy, especially among evangelicals, over whether the birth control pill might have an abortifacient mechanism that sometimes causes early chemical abortions. An understanding of this controversy necessitates a clear definition of abortion, abortifacient, pregnancy, implantation, and especially personhood. If a zygote (fertilized egg) is not a person, t...