北京读者王女士:我今年30岁,怀孕两个月了。最近一次做伸腿运动时,大腿突然抽筋了,差点站不起来。请问这是什么原因?连线医生——南京市中西医结合医院妇产科主任刘德佩缺钙是孕期抽筋的常见原因。胎儿骨骼生长所需的钙全部依赖母体提供,因此,准妈妈每天应保证约1.2克~1.5克的钙摄入量。若母体钙摄入不足,将造成血钙低下,导致肌肉收缩,继而出现抽筋。由于夜间血钙水平常比日间低,故这种原因导致的抽筋多在夜间发作。孕妇 Ms. Wang, Beijing Reader: I am 30 years old and have been pregnant for two months. Last leg exercise, the thigh suddenly cramps, almost stand up. What is the reason? Connection doctor - Nanjing Hospital of Integrative Medicine Obstetrics and Gynecology director Liu Depei calcium deficiency is a common cause of pregnancy cramps. Fetal bone growth required for all calcium-dependent mother to provide, therefore, expectant mothers should ensure that every day about 1.2 grams to 1.5 grams of calcium intake. Inadequate maternal calcium intake will result in low calcium levels, resulting in muscle contractions and subsequent cramping. Because nighttime blood calcium levels are often lower than during the day, cramps caused by this cause often occur at night. Pregnant women