Twinning Rates in Developed Countries: Trends and Explanations
The twinning rate has increased dramatically over the last four decades in developed countries. Two main factors account for this increase: delayed childbearing, as older women tend to have twins more frequently than younger ones, and the expansion of medically assisted reproduction (MAR), which car...
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| Формат: | Journal article |
| Опубликовано: |
Wiley
2015
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