There seems to be an implicit belief that all will be joyful as soon as a baby is born. However, that happiness appears to be hidden beneath a thick, imperceptible mist for a lot of new moms. The diapers pile higher, sleeplessness is as endless as the sky, and in place of them there’s sorrow, terror, and a twinge of shame. This is not “baby blues.” It’s something deeper, something heavier—something that must be attended to. It’s postpartum depression.…