What is the punishment for a mother's negligence towards her fetus, and what are the consequences for a husband who neglects to provide for his children?

If it is proven that the fetus died due to your negligence, then you must repent and seek forgiveness, pay the blood money for the fetus (five camels or 212.5 grams of gold), and offer expiation according to some scholars.

And if your husband does not spend on you equitably despite his ability, then he is clearly sinful.