Sleep disordered breathing (SDB) is very common during pregnancy, and is most likely explained by hormonal, physiological and physical changes. Maternal obesity, one of the major risk factors for SDB, together with physiological changes in pregnancy may predispose women to develop SDB. SDB has been associated with poor maternal and fetal outcomes. Thus, early identification, diagnosis and treatment of SDB are important in pregnancy.

The present study will be conducted to add a new information to the body of knowledge of physical therapy profession as it will provide scientific basis for the clinical application of diaphragmatic release in sleep disordered breathing during pregnancy

Inclusion Criteria:

• Pregnant women (at third trimester), diagnosed with sleep disordered breathing by the gynaecologist.
• Their ages will range from 30- 40 years old .
• Their BMI will be 25 to 30kg/m2.
• All are multipara.

Exclusion criteria:

Women will be excluded from the study if they have:

• Previous pulmonary surgery.
• any pulmonary diseases.
• Asthma.
• Neurological disorders
• Musculoskeletal disorders (severe osteoarthritis, osteoporosis)

pregnant female