mayan abdominal massage

Body: 

any thoughts on mayan abdominal massage and prolapse? i was advised to start this at week 20 of my pregnancy.......

I thought mayan massage was contraindicated during pg
also I think it would be hard to do and not very comfortable

Yes, generally speaking most types are contraindicated but I wonder how much of this is based on Western fear and misunderstanding rather than actual risks? Or is this the advice of the people who actually utilise this particular form of massage? I know nothing about Mayan abdominal massage and have been meaning to take a deeper look. Any chance anyone has some links or books they can throw out to help me start ;) ?