>Are twins or other multiple identical births caused by fertility drugs
>clones (due to their artificially stimulated origin) or not? By their
>strict definition, they are. Most people would say they were not.
But does this happen?
My impression is that such drugs just promote excess ovulation (and hence
`fraternal' twinning), rather than conducing to splitting a single embryo
shortly after fertilization. The latter would presumably lead swiftly to an
antagonist drug that people might take who wish to *avoid* parenting twins,
triplets, etc, something I haven't heard of.
Damien Broderick
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