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Evolving pattern of fetal movements throughout a healthy pregnancy. A 31-year-old woman with a history of stillbirth due to placental abruption at 29 weeks' gestation and one first trimester miscarriage documented a continuous record of her perceived fetal movements from 28 to 38 weeks' gestation. Repeated ultrasound examinations confirmed a viable pregnancy, with normal growth, liquor volume and Doppler profile. She delivered a healthy male infant at 38 weeks and 3 days' gestation. The data collected give a detailed record of fetal activity in a healthy pregnancy. Perceived fetal activity increased as pregnancy progressed and was greatest in the evenings. We also found that clusters of movements, which have previously been reported as protective against stillbirth, were felt earlier on in pregnancy.