Scientific EVIDENCE demonstrates that hormonal contraception DOES NOT interfere with implantation. Unfortunately, Conservatives cannot seem to understand statistics and *prespecified* hypothesis that are shown to be correct based objective data:
Contraception. Noé G, Croxatto HB, et al. 2011 Nov;84(5):486-92
This study had prespecified its expectations via statistical calculations to achieve the desired power to detect a difference. There is less than 1 chance in 10,000 that the null hypothesis was rejected incorrectly
Other studies supporting this:
Noé G, Croxatto HB, et al. Contraception. 2010 May;81(5):414-20.
Novikova N, Weisberg E et al. Contraception. 2007 Feb;75(2):112-8. Epub 2006 Oct 27.