Electronic cigarettes have recently entered circulation, but already now scientists are ready to declare their harm to health. Scientists from the University of Durham found that children of mothers who smoked e-cigarettes during pregnancy had similar "abnormal reflexes" to those whose mothers smoked regular cigarettes. Among the abnormalities were the absence of primary reflexes, such as grasping an adult's finger, and the child could also experience fright when the hand was removed from under his head. The study authors say the absence of these reflexes could be a sign of impaired brain development. Study lead author Suzanne Froggatt said: “Nicotine may have negative effects on the central nervous system, with previous animal studies suggesting damaging effects in the brain. Given the amount of nicotine in e-cigarettes and the postpartum effects on the fetus, we believe that mothers should not be encouraged to use e-cigarettes during pregnancy.” The team of authors of the new work admits that the study was small and several more tests are required, but now we can say that doctors can warn women about the dangers of e-cigarettes during pregnancy. So far, scientists have studied the results of 83 babies. 44 mothers did not smoke during pregnancy, 29 smoked regular cigarettes, and 10 smoked electronic cigarettes. Most babies were born at 37 weeks gestation. Infants of mothers who smoked traditional cigarettes had significantly less weight and head circumference at birth than others. Babies exposed to nicotine in utero had a higher number of abnormal primary reflexes and decreased "self-regulation" compared with children of nonsmoking mothers.