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| Create a new high! Study: For every 42 newborns, there are a pair of twins |
BEIJING, March 13, according to Singapore 's Lianhe Zaobao Network 12 reported a study, with the rapid development of medical assisted reproductive technology, currently the twins at any other time than ever before, every 42 newborns on There are a pair of twins.
Lianhe Zaobao
The research report, published in Human Reproduction, points out that more than 1.
Morden, a professor in the Department of Social and Demography at Oxford University in the United Kingdom, said: "The relative and absolute number of twins in the world is higher than at any time since the middle of the 20th century, and may be an unprecedented high.
Researchers said that assisted reproductive technology emerged in developed countries in the 1970s, resulting in an increase in the number of multiple births.
Researchers collected data from 135 countries from 2010 to 2015.
One of the researchers said that the increase in twin birth rates in poorer regions of the world is worrying.
The co-author of the study, Smith, said: "We need to pay more attention to the fate of twin birth rates in low- and middle-income countries.
