How many times should a pregnant have sex contact with their partner?

I am 27 weeks pregnant now but I became so active with my partner like we make love more than once a day as to my doctor's advise but I always ended up more like 3 times a day and 3-7rounds per sex. Would it be healthy for my baby? I don't have spotting though. I just ask this question because I also believe experience from others may enlighten me.