Read Part I of "The Great Embryo Killer?"
Having used what he believes to be sound reasoning to implicate NFP in avoidable embryo deaths, he then entertains some possible pro-life responses. Since there’s little actual reasoning in Bovens arguements, I’d just as soon skip his charicatures of pro-life rebuttals. However, since they involve subtle changes to his arguments and could easily stand on their own, I’ll briefly address them, if only to highlight his slight of hand.
"So what is the alternative? If one is concerned about minimising embryonic death, then one should avoid types of contraception whereby each unintended pregnancy (due to its failure) comes at the expense of a high embryonic death rate. Given our first assumption, a condom user (who makes no distinction between HF and non-HF periods) can count on one embryonic death for each unintended pregnancy. A rhythm method user, however, should count on two to three embryonic deaths for each unintended pregnancy. Assuming a success rate of 95% for condom usage, we can count on an expectation of .5 pregnancies in 10 years. Hence, the expectation of embryonic death is .5 per ten years for a condom user, which is substantially lower than the expectation of two to three embryonic deaths per ten years on the rhythm method. Even a policy of practising condom usage and having an abortion in case of failure would cause less embryonic deaths than the rhythm method."
"So how can this argument be blocked? First, one could say that the empirical data are questionable. However, the result really depends on the simple assumption that embryos conceived outside the HF period are less viable than embryos conceived during the HF period. If this is the case, then the success of the rhythm method is contingent on a higher embryonic death rate and so every pregnancy due to a failure of the technique will come at the expense of a higher embryonic death rate—and this is all that is needed to get the argument off the ground."
If that’s the case, then the argument is grounded. Continue reading →