Reply to What is the 5% chance at 42 based on?

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[quote=Anonymous][quote=Anonymous]There is a sharp decline in a woman’s ability to achieve pregnancy over age forty. [b]The fertility rate per month is only about 5% and even with in Vitro Fertilization (IVF), the most successful infertility treatment available, the pregnancy rate is only about 10% per try[/b]. This is due to the greatly reduced number of normal eggs.  Estimates from embryo biopsy reveal that at least 90% of a woman’s eggs are genetically abnormal when a woman is over 40. [/quote]

But people who go to IVF are not a random sample; they are significantly worse (having more problems) than average. This is where the question "what is this rate per month based on" comes from. How is that rate computed, based on what sample, with what history? It would be helpful to know stats for lesbians over 40, for example; or, in this case, for 42 year old women who had no problem conceiving 2 children at ages 38 and 39. Yes, there is drop in fertility, no doubt, yet there is also a significant variation among individuals. If this were not the case, OP could not have conceived her two children so easily.[/quote]

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