Conducted from an educational sociologist's point of view, this study explores the relationship of mother's age to the development of her child. A documentary frequency technique was used to investigate four general questions: (1) Do children of younger mothers, ages 16 years and under, have health problems different from the health problems of mothers either 17 to 20 years of age or 21 years and older when socioeconomic variables are held constant? (2) Do children born to younger mothers become ill more often than children of older mothers when socioeconomic variables are held constant? (3) Do children of younger mothers score significantly differently on the Denver Developmental Screening Test (DDST) than children born to older mothers when socioeconomic variables are held constant? and (4) Do children of married mothers of the same age group and similar socioeconomic status score differently on the DDST than children of unmarried mothers of the same age group and socioeconomic status? The sample was made up of 220 primigravida mothers whose male and female children were between 1 and 33 months of age. Mothers' ages ranged from 14 to 35 years. (Data pertaining to the sample were collected from medical records' reports of health problems, immunization status, laboratory findings, and DDST measures.) Results, which suggest that the school-age mother needs health education and infant care information, are discussed. (Author/RH)