When do I need to be on my side for prenatal massage?

[YAY my Eggo is Preggo!!]

I'm 16 weeks. My massage therapist said I can stay on my stomach as long as it's comfortable for me. Well it still is. So is there a point where you HAVE to be on your side to receive a massage?
Sorry, I guess I need to add I see a prenatal massage therpist. I know about all the pressure points. What I don't know is there a certain number of weeks or months pregnant when you have to be on your side.
Ok Adrienne the thing is what your post was in reference to was not answering the question. I didn't need information, I needed an answer.

Thanks anyway

 

[kdr_cmt]

I personally would not have any pregnant woman lie on her stomach flat on the table, no matter how comfortable she says it is. No other therapist I know would, either. The difference between lying in your bed on your stomach and receiving a massage lying on your stomach is that in your bed, you have a lot more cushioning underneath you, and no one pressing down on your back and creating pressure between you and the table. I'd be questioning this person's credentials.

 

[~*~3 WKS LEFT~*~]

I got my first prenatal message at 32 weeks and the girl who gave it to me who is certified in prenatal message kinda had me lay on my back with a ton of pillows of I was laying more at an angle not totally on my back. Then when it was time to do my back I laid on my side. I was still sleeping on my belly until like 20 wks & my doctor said as long as I was comfortable on my stomach that it wouldn't hurt the baby.