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THE NEW YORK TIMES | What We Don’t Know About I.V.F.
Most existing research has been able to compare only the postpregnancy health of women who have conceived using fertility treatments with that of those who did not. “But, of course, that crude comparison is not comparing apples to apples,” says Dr. Natalie Dayan, an obstetric internist and assistant professor of medicine at McGill University. “It’s comparing women with infertility who have tried multiple times and then became pregnant through A.R.T. and women who conceived naturally.” So it’s all but impossible to know which observed health risks are due to the fertility treatments and which are a result of the underlying cause of the infertility itself.
