It seems like you're looking for an important aspect of parenthood. Both "commitment" and "prenatal care" are essential components, but if I had to pick one that signifies a significant part of parenthood, I would suggest commitment.
Commitment reflects the dedication and responsibility that comes with being a parent, encompassing long-term emotional support, nurturing, and guidance throughout a child's life.
If you need further information or want to discuss any of the other terms in the context of parenthood, feel free to ask!