Obstetric problems concerning macrosomia were evaluated by retrospective review of 91 pregnancies that resulted in the delivery of an infant weighing 4,000 gm or more at the Yeungnam University Hospital during 3 1/2 years from Jun 1983 to Oct 1986. The results obtained were as follows 1. Macrosomic infants weighing 4,000 gm or more occurred in 2.8% of the deliveries. 2. 65.9% of macrosomic infants and 53.5% of total infants were male. The ratio of male was statistically higher in the macrosomic infants than in the total infants (P<0.05) 3. The incidence of macrosomia was higher with increasing gestational age, and deliveries at 42 weeks or more gestation were more common in the macrosomic infants than in the total infants (P<0.01).