Table 1.

Sleep Characteristics and Physiological Physical Features Affecting Sleep in Pregnancy^{30, 31, 32, 33}

	First Trimester	Second Trimester	Third Trimester
Mechanical and physiological factors impacting sleep	Nocturia Musculoskeletal discomfort	Fetal movement Uterine contractions Musculoskeletal discomfort Rhinitis and nasal congestion	Nocturia Fetal movement Uterine contractions Heartburn Orthopnea Leg cramps Rhinitis and nasal congestion Sleeping position