Note: Postings to Androlog have been lightly edited before publication.In recent years, as industrialization and occupational subspecialization have increased, demands on the work force have also grown significantly. These demands, including increased vocational and educational training, have contributed to the trend for both men and women to have children later in life. The Centers for Disease Control regularly reports trends for live birth rates in the United States in the National Vitals Statistics Report. Birth rates are stratified by a number of parameters, including maternal age. Although the Centers for Disease Control no longer directly tracks paternal age in this report, the female data provide insight into reproductive trends for couples in the United States. In recent years, the birth rates for women in their thirties and forties has continued to increase, with birth rates for women 30 to 44 years being the highest on record since the mid-1960s (Hamilton et al, 2006).
展开▼
