Fetal movements (FM) were measured using a real-time B-scan method in 50 women in the 3rd trimester. Observations [195] were made. Number of FM per 20-min observation period was similar in normal, diabetic and hypertensive pregnancies and in patients with placenta previa, but was significantly lower in patients with Rh isoimmunization and an affected fetus. The number of FM did not vary with gestational age, mode of delivery or birth weight and was significantly increased in patients either with a reactive nonstress test or in the presence of fetal breathing movements. Fetal movements were absent before delivery in 4 patients. In 3, the fetus died in utero and in the other a positive contraction stress test was observed. In 2 other fetuses who died in utero, FM were observed during the last examination before death. In both, the cause of fetal death was related to acute change. No relationship between FM and neonatal death was observed. FM monitoring may be helpful in evaluating antepartum fetal condition.