20-25 IMO for women and add 5 more for men. Get them over with!
But, 22 biologically, for women I remember reading. Let’s not forget that at 47 the odds that the child will have problems (downs for one) are way up there,
I totally agree. My wife and I started when she was 19, and I was 21. I'm now in my mid-30s and we had our last one a year and a half ago. With work and everything else going on, it really takes it our of you. MUCH easier when you're younger.