There is surely an evolutionary advantage to female behaviour after giving birth?
The behaviour, often called instinct, leads the female to nuture and stay with the baby, ensuring it's survival.
If she did not behave in that way, just gave birth and walked away, humans would not last very long. The human baby is very vunerable for quite some time after birth.
In our modern western world we now have a huge say in our fertility - if we want a child, when we want it, and with whom. We can also expect equal opportunity after the birth.
But this Men and women have the exact same sex hormones, they are just in different amounts and govern reproduction only. They do not control our thoughts, intelligence, decisions or autonomy would not stand up to examination. Intellgence maybe but thoughts, decisions and autonomy will be quite defined by sex hormones in times of feritiliy and birthing.