Symptoms of pain in the hip bone when you are more than six months pregnant are mostly considered to be caused by pelvic separation. During pregnancy, a special hormone, relaxin, is secreted in a woman’s body. Under the effect of relaxin, the ligaments of the joints of the pelvis become relaxed, which increases the mobility of the joints of the pelvis, and this change facilitates the entry of the fetus into the pelvis during a full-term pregnancy and its delivery through the birth canal. It also has some adverse effects, the most important of which are back pain and pain in the hip area. In order to relieve these symptoms, pregnant women should control the total calorie intake in their diet, control their weight and allow them to grow reasonably, and should take appropriate calcium supplements.