Yes, the biology gets in the way doesn’t it?
The prime fertility of both males and females is when then they are young.
Fertility in both men and women declines as they get older.
There is both the issue of having the energy to keep up with young children, and the issue of your physical capabilities of conceiving children.
Maybe all of this may make us see that traditional families, with a stay at home mother, make sense in ways which people haven’t thought about. Maybe it makes sense for mothers to have children in their 20s, while her husband goes out and works hard in a career to support the family.
I’ve heard so often of people waiting to have children until some goal is reached, or some optimal time in their lives happens.
Psalm 127 gives us direction. I did not know nor heed this, now I’m a tired older daddy...
Psalm 127
3 Lo, children are a heritage of Jehovah; And the fruit of the womb is his reward.
4 As arrows in the hand of a mighty man, So are the children of youth.
5 Happy is the man that hath his quiver full of them: They shall not be put to shame, When they speak with their enemies in the gate.