I had my children at 36 and 38, and I'm the mother, and energy-wise, I've had no issues. Yes, they considered me to be of "advanced maternal age" in the OB department and gave me special treatment due to it, but my doctors told me that the "advanced maternal age" threshold (35) was based off outdated research anyway. In the bay area, most of the mothers I've met were around that age, and my friends are having their kids at the same age.
It was really nice that I had time to establish my career and figure things out before having kids.
It was really nice that I had time to establish my career and figure things out before having kids.