Natasha’s child was stillborn, or close enough to it— she named her Rose. The father, a soldier named Nikolai, Natasha’s first husband, perished in the fighting, along with much of her unit. Natasha survived.
I love particularly the following exchange:
Old Woman: Anya, go with him. Leave baby Rose with me. I think you should hold her, Natasha.
Old Woman: Coward.
Natasha: Maybe I am.
But she holds the baby anyway. There are so many different sorts of courage.
From Black Widow #4, by Marjorie Liu and Daniel Acuña.