Age at first birth and the length of the second birth interval: is a positive relationship universal in modern populations?
Swanson, D.A.
Janasamkhya 4(1): 57-64
1986
PMID: 12341005 Document Number: 420248
"Age at first birth has been found to be positively associated with the length of the second birth interval in several studies. One researcher has hypothesized that such a relationship would be found in any population in which contraception is widespread and women are exposed to non-maternal roles. However, in this study a positive relationship is not found for caucasian women in Hawaii, a population in which contraception is wide-spread and women are exposed to non-maternal roles. The findings suggest a revision of the hypothesis to accommodate more complex relationships."