“…Much of this research, however, has been limited to cohorts born after 1945 (see Beets & van Hoorn, 1988;Dorbritz & Schwarz, 1996;Houseknecht, 1987;Kiernan, 1989;McAllister & Clarke, 1998;Niphuis-Nell, 1979), and there is some debate among scholars as to the meaning and existence of voluntary childlessness among earlier cohorts. For example, demographers in the United States in the 1920s and 1930s estimated that between 25% and 40% of childless married couples had remained childless by choice (Lorimer & Osborn, 1934; see review in Poston & Kramer, 1983), though more recent scholars have described this behavior mainly as deliberate fertility delays that for most resulted in inadvertent rather than voluntary childlessness (Rindfuss et al, 1988). The major roles of delayed and nonmarriage, fertility delays, and age-related fecundity (see Hastings & Robinson, 1974;Morgan, 1991), as well as limited birth control options and strong cultural prohibitions against childbearing outside of marriage, advise against applying contemporary notions of voluntary childlessness to earlier cohorts.…”