Maternal heart rate in pregnancy.
Serial morning heart rates were obtained from 10 women runners prior to and during pregnancy. By 8 weeks' menstrual age, maternal heart rate had risen 8 bpm with an overall pregnancy-associated increase of 16 bpm. Potential mechanisms are discussed.
D005260:Female; D006339:Heart Rate; D006801:Humans; D008991:Monitoring, Physiologic; D011247:Pregnancy; D012420:Running