Nature doesn't care that women want a career or not though. Also it's a fact that birth and complications rise dramatically the older a woman gets, especially at age 30.
Another interesting biological fact:
The study published by the University of St. Andrews and Edinburgh University in Scotland found that women have lost 90 percent of their eggs by the time they are 30 years old, and only have about 3 percent remaining by the time they are 40.
For Women Who Want Kids, 'the Sooner the Better': 90 Percent of Eggs Gone By Age 30
A new study by the University of St. Andrews and Edinburgh University shows that women lose about 90 percent of their ovarian eggs by the time they're age 30, making it much more difficult to have a successful pregnancy and healthy baby. Dr. Marie Savard, ABC News medical contributor, discusses...abcnews.go.com
Hmm, seems nature is trying to say something here... Guess what? All doctors agree, women should have children sooner than later for a myriad of biological reasons.
Yes, it's a fact that the number of eggs women have decreases steadily once women hit their 30's. Still, the vast majority of them don't have problems becoming pregnant (around 50% within six months after trying to conceive) and giving birth to healthy children. Sure, nature has programmed women to have their fertility peak around 25. But that doesn't necessarily mean that everyone must adhere to that, that would be biological determinism.
Should we cheat on our wives whenever we can, given the fact that we tend to be polyamorous by nature?