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Monitoring mother and baby

Meredith Dobrosielski (cq), 36, exercises on a treadmill in Dr. Andrew Satin's lab as part of a health study about pregnant women and the effects of exercise. She was an avid runner for several years and is now in her 31st week of pregnancy. She's hooked up to a maternal/fetal monitor (lower left) which also takes the mother and fetus's heart rate. Baltimore Sun photo by Algerina Perna
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