“…As more couples delay childbearing, the issue of declining reproductive capacity with age becomes increasingly important. In addition, as more young adult women spend extended periods in education or pursuing career opportunities that have recently opened up to women, they may repeatedly decide to postpone childbearing, and thus drift into childlessness (Merz and Liefbroer 2012). Such individuals, who express a positive fertility intention but postpone childbearing until it is "too late", are described by Berrington (2004) as "perpetual postponers".…”