A West Oak Lane man was critically injured this morning after his estranged, pregnant girlfriend allegedly stabbed him during an argument.

The victim, 20, remains at Albert Einstein Medical Center in critical condition after surgery, police said. His ex attacked him about 11:30 a.m. at his rowhome on Georgian Road near Ogontz Avenue and then fled with the estranged couple's older child, who neighbors said was about 9 months old. Police are searching for her. It's unclear what sparked the argument.

Anyone with information about this incident can call Northwest Detectives at (215) 686-3352 or -3353.