Well menopause generally starts in your late 40's- early 50's, which means in your early 40's your in your last childbearing years. It's well documented that women who give birth in their 40's are more likely to have children with Down Syndrome and other illnesses and are more likely to have a difficult/dangerous childbirth. Also, saying you gave birth at 42, you'd be 60 by the time you're child is 18. I'd be ready to think about grandbabies and retirement then, not how I'm going to pay for my kids college.

"We submit to the majority because we have to. But we are not compelled to call our attitude of subjection a posture of respect." Ambrose Bierce