Lying on stomach in males is prohibted in islam and it comes with Allah's wrath...what about among women...can they lye on their stomach??
ISLAM = BEST WAY OF LIVING LIFE.
IF SOMETHING IS PROHIBITED IN ISLAM THEN YOU ALSO CAN RESEARCH, THAT THING IS ACTUALLY FOR YOUR BETTER HEALTH AND TO AVOID HARM FROM SUCH ACT.
LYING ON STOMACH IS PROHIBITED FOR BOTH GENDERS, THAT THING IS NOT GENDER SPECIFIC.
SEARCH ON "LIVING STANDARDS IN ISLAM" OR "LIVING STANDARDS BY HAZRAT MUHAMMAD S.A.W.W ACCORDING TO HADEES". (you may find more stuff.)
I hope to answer your question. as per my knowledge.