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J Appl Physiol. 2009 May;106(5):1487–1493.CrossRefGoogle ScholarPubMed What are the factors that enable to baby to initiate respiration immediately postpartum?A number of factors have been implicated in the initiation of postnatal breathing: decreased oxygen concentration, increased carbon dioxide concentration and a decrease in pH, all of which may stimulate fetal aortic and carotid chemoreceptors, triggering the respiratory center in the medulla to initiate respiration.
What is the stimulus for the baby's first breath?After delivery, a healthy term baby usually takes its first breath within 60–90 seconds of clamping or obstructing the umbilical cord. Separation of the placenta and clamping of the cord leads to the onset of hypoxia, which is initially a major stimulant to start respiration.
What are the factors that speed up the dilation of the cervix?Getting up and moving around may help speed dilation by increasing blood flow. Walking around the room, doing simple movements in bed or chair, or even changing positions may encourage dilation. This is because the weight of the baby applies pressure to the cervix.
What are the factors that affect the onset of labor?Factors Affecting Labor. At least five factors affect the process of labor and birth. These are easily remembered as the five Ps: passenger (fetus and placenta), passageway (birth canal), powers (contractions), position of the mother, and psychologic response.
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