This is an excellent idea although I believe this is what people in sweden do. and as robin suggested it meant a more engaged grandparent relationship.
Stop Stale Eggs, Jobs?
By Robin Hanson · March 17, 2010 9:15 am · Discuss · « Prev · Next »
Some men see things as they are and ask why. Others dream things that never were and ask why not. Shaw
The average woman is born with around 300,000 eggs … 12 percent of those eggs remaining at the age of 30, and only 3 percent left by 40. … From the mid-30s on, the decline in fertility is much steeper with each passing year. … Female undergraduates significantly overestimated their fertility prospects at all ages. … The biological reality that female fertility peaks in the teens and early 20s can be difficult for many American women to swallow, as they delay childbirth further every year. … The older you get, the more difficult it is to get pregnant and the higher the chance of miscarriage, pregnancy problems such as gestational diabetes and hypertension, and chromosomal abnormalities such as Down syndrome. … The risk of autism increases with a mother’s age.
More here. Also, Andrew Leigh:
We estimate the relationship between maternal age and child … learning outcomes and social outcomes. … Children of older mothers have better outcomes. … When we control for other socioeconomic characteristics, such as family income, parental education and single parenthood, the coefficients on maternal age become small and statistically insignificant.
Today high status women stay long in school, start careers, and take long to match up with a man before having kids. They are often too late, their kids have more defects, and the interruption hurts their career. Low status women more often have an accidental early kid out of wedlock.
Imagine a different equilibrium, where females pick a male at 15, then school more slowly to have kids till some standard age (20? 25? 30?), when females return to full-time school and uninterrupted careers.
via Overcoming Bias : Stop Stale Eggs, Jobs?.