Less twins are born to Asians than any other race yet the Japanese are more likely to have identical twins rather than fraternal twins. Twins are more likely to occur in larger families as well. This also goes along with the increased twinning rate in older mothers for those are the ones more likely to have more children. New fertility treatments are greatly increasing the twin rate beyond what it was in previous years. Today, at least 20 percent of pregnancies conceived with one medication called Pergonal, will end up having twins.
Fraternal twins are also the hereditary kind.
It is one of the most frequently asked questions of twin parents. Some don't know the family history while others do. When someone asks if twins run in your family and you had identical twins, you can tell them it doesn't matter because it is fraternal twins that are hereditary. Inc. PageWise makes no representations about the content published on this site. PageWise hereby disclaims all warranties and conditions with regard to this information, and user agrees that all such use is at its own risk.