An interesting study. I remember seeing a 60 minutes piece about this years ago. Young women thought they could have children in their mid 50's. Men's fertility also drops with age, though not as rapidly. There is evidence that men also have biological clocks.
Women are delaying childbirth until later and later in life partly because they have an exaggerated belief that fertility treatments will help them get pregnant well into middle age, suggests new Canadian research.
Media accounts of older celebrity mothers and even advice from ill-informed family doctors is fuelling unrealistic expectations about in vitro fertilization (IVF) and other reproductive technology, said Judith Daniluk, a psychology professor at the University of British Columbia.
Women who responded to a recent survey by Prof. Daniluk suggested they expected to delay childbirth until much later than even they considered ideal, and that they believed fertility treatments were far more effective later in life than is really the case.
In fact, the efficacy of treatments for infertile women declines precipitously after the age of about 34, with the technology-aided birth rate hitting barely 1% for those age 46.