2 to 1 they'll say postpartum depression and blame some preexisting personality or mood disorder.
I also got my money on OCD.
There was also some couple who let their newborn child starve to death while they tended to the needs of an online video game baby. These days it's not worth doing unless there's XP involved. It's very sad.
In the age of many contraceptives, and abortion as post-measurement I really don't understand why some people have the need to procreate when they obviously aren't meant to be caregivers to anyone, or anything that is not a computer simulation that is.