What’s better than one baby? Two babies! And lucky for us, we are living in a time when more twins are being born than ever.
According to a global overview in the journal Human Reproduction, about 1.6 million twins are born each year – that’s one in every 42 children born.
The increased use of medically assisted reproduction since the 1970s – for example IVF, ICSI, artificial insemination and ovarian stimulation – have been the main reason.
The researchers collected information on twinning rates from 165 countries for 2010 to 2015, and compared them with rates for 1980 to 1985.
It found that twinning rates in all regions the 30 years have increased, from a 32% rise in Asia to a 71% rise in North America. Interestingly the twin rate in Africa has always been high. This is because of the continent’s population growth, and the high number of dizygotic twins – twins born from two separate eggs – born there.