Chronic pelvic pain (CPP), a frequent complaint in clinical gynaecology, is defined as cyclic or acyclic pain located in the pelvis, persisting for 6 months or more, and severe enough to cause functional incapacity that requires medical or surgical treatment (or both). Chronic pelvic pain is the reason for approximately 10% of all gynaecologic consultations

Women who showed an imbalance of the pelvis also experienced greater pain. A possible explanation for this is that the change in the position of the uterus, due to the imbalance of the pelvis, prompted an excessive amount of prostaglandin to be secreted. When the spinal alignment of women who had intense menstrual pain was put back to normal, the pain was alleviated. The level of tension in the ligaments and nerves connecting the sacral vertebrae and the uterus is the cause off the menstrual pain. Due to the abnormal restriction of movement of the lumbosacral vertebrae, body fluid increase within the pelvis as wells contraction of the uterus leading to the intensification of the menstrual pain.

Stabilization of anterior and lateral pelvic curves through exercise or osteopathic manipulative techniques that utilizes techniques of muscle energy, balanced ligamentous tension, myofascial release, strain and counterstrain to assist muscles to keep the spine upright and sufficiently flexible to support good posture . Correct posture involves a straight spine, which maintains the natural curve of the spine in the human body. Correct posture minimizes the strain on the human body by maintaining balance of the muscles and skeleton. This balanced musculoskeletal state protects the supporting structures in the body and prevents damage or progressive deformation in all positions, including standing, lying down, and sitting. Additionally, correct posture implies not inclining the body forward, backward, left, or right.

The temporomandibular joint is surrounded by ligaments, muscles, nerves, and blood vessels. The masticatory muscles enable mouth opening and closing, lateral movement, and forward and backward movement of the mouth, and excessive tension or imbalance of muscles can limit the joint movements, possibly resulting in limited ROM. Thus, it can be surmised that the imbalance in the spinal muscles caused the imbalance in the temporomandibular muscles and limited TMJ mobility.

Inclusion Criteria:

• The age of the participants will be ranged from 20 to 40 years.
• Their body mass index will be ranged from 20 to 25 kg/m2.
• They will have regular menstrual cycle.
• They will not receive any hormonal therapy or taking any regular drugs.

Exclusion Criteria:

• Bone disease.
• Discogenic state with radiculopathy or not.
• Systemic disease of musculoskeletal system.
• Any sensory problems.
• Previous vertebral fractures.
• Major spinal structural abnormality.
• Major jaw abnormality.
• Any jaw orthotics or prosthesis.
• Missing teeth.

90 women will participate in this study, thirty women diagnosed as having cyclic pelvic pain and thirty women diagnosed as having non cyclic pelvic pain thirty women normal women will not having pelvic pain. They will be selected from outpatient clinic of obstetrics and Gynaecology department in El-Hosary family health Centre.

All participants will be given a full explanation of the protocol of the study and informed consent form will be signed from each subject before participating in the study (