The range of birth control choices may have become narrower for couples that believe the sanctity of life begins when sperm meets egg. The rhythm method, a philosopher claims, may compromise millions of embryos.
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[Luc Bovens, of the London School of Economics, in the Journal of Medical Ethics] argues that, because couples are having sex on the fringes of the fertile period, they are more likely to conceive embryos that are incapable of surviving.
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Bovens calculates that, if the rhythm method is 90% effective, and if conceptions outside the fertile period are about twice as likely to fail as to survive, then “millions of rhythm method cycles per year globally depend for their success on massive embryonic death”.
New Scientist
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