To understand the effect of grandparents on feeding patterns and growth of infants. Methods A cross-sectional study was conducted in Guangdong province in 1992 to obtain information about the growth and the feeding pattern of infants in southern china. The subjects included 383 infants in urban area and 394 infants in rural area at the age of 4 month as well as 375 infants at the age 8 month in urban area. According to the persons who determine the infant's feeding practices the subjecs were classified into...