A lot of people aren't going to want to hear this but much of the "depression" that parents (and not just moms) suffer after child birth is due not so much to hormones but to the fact that children, especially babies, are demanding and difficult and require us to subordinate our own needs and desires for their sake. The more selfish you are, the more of an adjustment it's going to be.

Community note

Medical sources say postpartum depression is multifactorial. Rapid drops in estrogen and progesterone after birth are key biological factors, along with sleep loss and adjustment stress. It is not primarily attributed to selfishness.

https://my.clevelandclinic.org/health/diseases/9312-postpartum-depression

https://www.mayoclinic.org/diseases-conditions/postpartum-depression/symptoms-causes/syc-20376617