PPT Slide
Mean weight of first births was positively associated with mothers' age from 12 years to 21 years, rising consistently from 2930 grams at 12 years to 3112 grams at 21 years. (Table 1)
Mean weight of births to mothers above age 21 years did not consistently increase with mothers' age, although for most ages above 22 years they were higher than 3112 grams. (Figures 1a and 1b)
Mean weights of 2nd, 3rd and 4th births increased consistently with mothers' age until 29 years however, they were lower than mean weights of 1st births until ages 18, 20, and 21 years, respectively. (Figures 1a and 1b)
Relationship between mothers' age and mean birth weight of 1st - 4th births to mothers at each age was unchanged by trimester of prenatal care initiation or marital status (1996-1999 mothers combined to obtain sufficient married adolescents for analysis). (Figure 2)