Intrauterine diethyltoluamide exposure and fetal outcome.

The CNS toxicity of the insect repellent, diethyltoluamide (DEET), has been documented by several publications on severely affected adults and children. We report a 4-year-old boy with mental retardation, impaired sensorimotor coordination, and craniofacial dysmorphology, whose mother applied DEET daily throughout her whole pregnancy in addition to the prophylactic use of chloroquine.