A pregnant woman was brutally attacked and robbed outside the Roosevelt Avenue 7 train in Queens on Monday evening by her boyfriend’s friend, police said.

The 26-year-old victim was exiting onto 111th street just after 7 p.m. when she was approached by Scott Gooden, 26, a friend of her baby’s father, who demanded she hand over her purse, which had $600 in it, cops said.

Police said he wrangled the bag from her and took off down the street while the mother-to-be chased after him, demanding the cash back.

He became angry that she was following him and used a small blade to stab her in the shoulder before taking off again, cops said.

The brute was arrested shortly after and the cash was returned to young mom.