In this case? When talking about murdering their own children? Have any studies actually been done to prove that or is that just some assumption you've made? There's no doubt they get pussy passes in certain situations. I have a very hard time believing child murder is one of them.
Quick Google search shows plenty of women sentenced to life in jail for killing their child. All of them? No. But certainly enough to show their is no pussy pass for child murdering cunts.