It's about two blocks south of Eglington, on the west side of bayview. There is a Bank of Montreal downstairs. For the safety reason, the clinic doesn't have any label outside and you can only get in through a small door on the north side of the building. Your friend needs to make an appointment and to have her test results with her. Unfortunately, I don't have the phone number and don't remember its name.
I also know a Chinese maternal physician is also doing this. His name is Jeremy Wong, and his office is located in Kennedy & Sheppard. The office is always very busy as many pregnant women choose him. Not sure if he accepts new patient though.