23 Jun, 15 | by BMJ
Guest post by Sally Sheldon
We tend to talk about contraception and abortion as if they were two separate and readily distinguishable practices, the former preventing pregnancy and the latter ending it. This understanding has a very important effect in current British law, where a relatively permissive approach to the availability of contraception stands in stark contrast to the morally grounded, onerous criminal sanctions against abortion. Yet is the distinction between abortion and contraception really so clear cut? How and why do we make it? And is the line that we have drawn between the two morally defensible?
As a matter of biological fact, the development of human life is not characterised by bright lines. As the eminent lawyer Glanville Williams once put it, “abstract human life does not ‘begin’; it just keeps going.” A seamless biological continuum exists through the production of sperm and egg, their joining together in a process of fertilisation, the gradual development of the new entity thus created throughout pregnancy, birth, subsequent growth, eventual death and ensuing decay of the body. Defining what happens along the way as an ‘embryo’, ‘fetus’, ‘person’, ‘adult’, or ‘corpse’ requires an attempt to draw lines on the basis of criteria selected as holding significance for legal or other purposes. How and where we draw such lines is a tricky business, involving careful moral reflection informed by medical fact.
The “regulatory cliff edge” between the relatively permissive regulation of contraception and the criminal prohibition of abortion relies on a line drawn on the basis of the biological event of implantation, where the fertilised egg physically attaches itself to the wall of the womb some six to twelve days after ovulation. Yet while enormous legal weight has been placed upon it, little consideration seems to have been given as to why implantation matters morally. The voluminous philosophical literature on the ethical status of the human embryo and foetus offers little support for the view that implantation is an important marker.
Further, while it might once have been suggested that implantation offers a conveniently timed moment for a necessary gear change between the appropriate regulation of contraception and abortion, this argument is difficult to sustain in the light of modern medical science. more…