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The National Health Service (NHS) advises pregnant individuals to sleep on their side, either the left or right, for optimal safety during pregnancy. [36] Research indicates that beyond the 28th week, assuming a supine (back) sleeping position can result in a twofold increase in the risk of stillbirth. [36]
What is the healthiest sleeping position? Sleep experts discuss which positions are best and worst for back pain, sleep apnea, pregnancy, acid reflux, and more. ... sleep apnea, pregnancy, acid ...
Overall, the systolic and diastolic blood pressure drops 10–15 mm Hg in the first trimester and then returns to baseline in the second half of pregnancy. [6] All of these cardiovascular adaptations can lead to common complaints, such as palpitations, decreased exercise tolerance, and dizziness.
Also starting about week 12, the thoracic diaphragm moves up and down as if the fetus were breathing, but this movement disappears about week 16 and does not resume until the third trimester. [16] Movements such as kicking continue, and the mother usually feels movement for the first time, an event called quickening, during the fifth month. [17]
Fetal position (British English: also foetal) is the positioning of the body of a prenatal fetus as it develops. In this position, the back is curved, the head is bowed, and the limbs are bent and drawn up to the torso. A compact position is typical for fetuses. Many newborn mammals, especially rodents, remain in a fetal position well after birth.
A Canadian survey found that 39% of respondents preferring the "log" position (lying on one's side with the arms down the side) and 28% preferring to sleep on their side with their legs bent. [1] A Travelodge survey found that 50% of heterosexual British couples prefer sleeping back-to-back, either not touching (27%) or touching (23%).
During vaginal birth, the newborn's chest is compressed by the birth canal. Upon delivery, negative pressure allows air into the lungs. The first cries of the infant allow for alveoli expansion and absorption of fetal lung fluid. Temperature changes and other sensory stimulation contributes to respiratory function as well.
In a first pregnancy it may happen a few weeks before the due date, though it may happen later or even not until labor begins, as is typical with subsequent pregnancies. [58] It is during the third trimester that maternal activity and sleep positions may affect fetal development due to restricted blood flow.