Fetal behavior Anencephaly Medulla oblongata Abstract Fetal behavior in monozygotic twins, one being anencephalic, was serially recorded from 20 to 35 weeks of gestation and analyzed. The commencement of breathing movement was concluded to reflect the development of the medulla oblongata of the fetus. Osamu Kurauchi, MD, Department of Obstetrics and Gynecology, Nagoya University School of Medic...