They were perhaps the most, if not a runner-up to euthanization and being willing to kill the babies that turned out other than what they wanted.
What few people realize is that routine infanticide is the human norm, historically speaking.
The modern approach of not (until recently) killing unwanted children is what is unusual. That is based on Jewish, Christian (and Muslim) ethics. Though modern secularists won’t admit it.
In the classical world a child born into a household did not gain a “right to life” till he was accepted into the household by its head.