At what age(on average) do women become unable to have children?

Around 45.

When a woman hits 30, she will only have about 12% of her eggs left and by 40 she only have about 5% chance to get pregnant every month.

Doctors generally put it at 44.

@ Kasey - women typically become infertile some years before going through the menopause. Average age of menopause is 52.

women on average are unable to have children after going through menopause, this is a stage in life we women go through which means we no longer get our period! yippee@ not really. this means cold sweat, hot flashes and unable to sleep allot of nights. but on average most women go through this at ages 50-60 maybe even 45-50.

I'm not sure, but I read not too long ago about a grandmother in her 60's who was a surrogate mother for her own grandchild. Her daughter could not get pregnant. I don't know if you would count this, because she had to be injected with hormones to get back out of menopause.

I think natural menopause happens to women in their 50's, mostly. But I could be wrong, not bothered to look it up. :)

It depends on the woman and the completion of menopause in her body.

FYI: did you know that old men having babies is the reason for increasing cases of alzheimer's disease? Quick, get a warning label for all those male enhancement products.

uh 40's or like 50's