What does this abbreviation mean on my chart?

So, I'm just about 8 months pregnant and I see the doctor twice a week. Well, on my next appointment it says that I have to do an NST/AFN/OB and then it says 8MC.... What does the 8MC mean? I know that the NST is the non-stress test, the AFN is the amniotic fluid check, and OB means I have to see the doctor. I just don't know what 8 MC stands for. Does anyone know? I can ask the doc next time I go, but was curious to find out beforehand!