RUTH JENKINSON / MIDIRS / SCIENCE PHOTO LIBRARY RUTH JENKINSON / MIDIRS / SCIENCE PHOTO LIBRARY
Foetal monitoring during labour. Woman in early labour attached to a cardiotocography (CTG) machine that monitors her foetus' heartbeat. She is holding a face mask through which she can get Entonox, a painkilling mixture of nitrous oxide and oxygen. The foetus' heartbeat is picked up by an ultrasound scanner strapped to the woman's abdomen and printed by the CTG machine at left. The machine also records uterine contractions. The foetus' heartbeats are closely monitored during childbirth in order to detect problems such as foetal distress, which occurs when the baby's oxygen supply is impaired.
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