'Rhythm Method' May Kill Off More Embryos Than Other Methods Of Contraception

http://www.sciencedaily.com/releases/2006/05/060526180749.htm

Professor Bovens says the rhythm method of birth control may owe much of its success to the fact that embryos conceived on the fringes of the fertile period are less viable than those conceived towards the middle. Professor Bovens calculates that two to three embryos will have died every time the rhythm method results in a pregnancy. It will be interesting to see if this affects the extreme fringe of the so-called "right-to-lifers." My own experience with having conversations with them is that their real motivation to opposing contraception and abortion, even for a clump of a half-dozen cells, is that they consider pregnancy a fitting punishment for people having sex, more than any caring about the welfare of the potential baby.