“…Given the reported frequency of phencyclidine use, the fact that phencyclidine crosses the placenta, and the possibility that intrauterine exposure to phencyclidine may be harmful to the fetus, we undertook a large prospective study to describe the extent of phencyclidine use during pregnancy and the characteristics of the user population [4]. gave a verbal history of phencyclidine use but only 0.8 percent could be confirmed as current users by maternal urine screening [4], The purpose of the present study was to describe the physical characteristics, neurologic findings, behavior, and neonatal clinical course of the infants of these women, and to compare them with a group of matched control infants.…”