This is a vast topic, as described in previous parts too. Few herbs to be given to baby as well as in mom’s diet too:

Dry ginger + Gudvel + Nagarmotha- Prepare it’s decoction & to be given to child as well as mother

Shatavari in hot milk with Khand-sari should be had regularly

Coconut laddoo, khus-khus kheer is supposed to had regularly