Not at all. There has been (that I can find) no proven case that the pill has caused an abortion. It is theoretically possible - maybe even probable. But still theoretical.
There is nothing theoretical about it at all coyote. If a woman who is taking the pill is still experiencing a menstral cycle, she is still ovulating. If she is still ovulating, then eggs are present which can be fertilized. Of course we have already been through this before and it is somewhat dissappointing that you continue to repeat a lie when it has been proven to be a lie.
The claims that suggest that BCP's are not abortificient are based on the erouneuos and outdated idea that a woman is not pregnant until implantation occurs. The truth, coyote is that BCP's cause the deaths of somewhere between 1.3 and 1.8 million living human beings per year because they are unable to implant in the uterus.
The known failure rate of BCP's in which the woman actually has a child is 3 to 5 per 100 woman year. Considering that over 10 million women are presently taking the pill, the suggestion that it is only theoretical that embryos die due to the pill is, at best, disingenuous. Here are some figures for you to consider before you make the "claim" that birth control pills are not abortificient again:
Contraceptive Rate of Ovulation ----- % Breakthrough Pregnancy
Combined Pill Up to 5% ..... 0.1 ****
Progestogen-only Pill 40-60% ..... 0.3
Intra-uterine Device Up to 100% ....... 0.6
Norplant Implants 10-50% ** ....... 0.09
Depo-Provera Injection 1% *** ........ 0.3
** Rising with each consecutive year of use.
*** Derived from 0.3-0.7 % breakthrough pregnancies per year.
**** Figures for first year of use, for perfect usage