The victim had a baby just two days earlier. She suffered injuries and severe pain from the fall.
The attacker is described as a black male, 18-25 years old, 5'8" to 5'10" and weighs around 160 pounds. Police say he took off running toward the Haverstock Hill apartments, and it's possible he lives there.
If you have any information, call Crime Stoppers at 713-222-TIPS. You don't have to give your name, and there is a cash reward.