World at 'peak twin' as birth rates reach historic high, study finds

Access to IVF and fertility services and postponement of parenthood drive rise in global twinning rates

Twins may be more common today than at any time in history, according to the first comprehensive survey of twin births around the world.

Researchers analysed records from more than 100 countries and found a substantial rise in twin birthrates since the 1980s, with one in 42 people now born a twin, equivalent to 1.6 million children a year. According to the study, the global twin birthrate has risen by one-third, on average, over the past 40 years.

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