Record international number of twin births

But it could be all downhill from here as the focus shifts to one baby per pregnancy, which is less risky. According to a global overview in the journal Human Reproduction, the peak was reached because of large increases in twinning rates in all regions over 30 years - from a 32% rise in Asia to a 71% rise in North America. The researchers collected information on twinning rates from 165 countries for 2010 to 2015, and compared them with rates for 1980 to 1985.