Twins peak of more birth than ever before, study shows
About 1.6 million twins are born every year worldwide, with one in every 42 children born to a twin.
Delayed childbearing and surgical procedures such as IVF have seen a third increase in the number of twin births since the 1980s.
“The trends are really quite striking,” said Christiaan Monden, a professor of sociology and demography at Oxford University. “Over the past 40 to 50 years we’ve seen a strong increase in twinning rates in rich, developed countries, and that has led to more twins in both a relative and an absolute sense than we’ve seen ever before.”
The report found that the fate of twins in low-and middle-income countries was more of an issue.
In sub-Saharan Africa, in fact, many twins will lose their co-twin in their first year of life-more than 200,000 a year.
Raj Mathur, the chair of the British Fertility Society and a consultant gynaecologist at St Mary’s Hospital in Manchester, said: “It doesn’t surprise us that twinning rates have increased because the availability of assisted reproduction has increased and also because women are slightly older when they have their first children, and both those things will increase the twin rate.