1:14GettyABC NewsApril 5, 2018What is the definition of twins?"Twins" are two children carried by an expecting mother at the same time, but there are more than one kind.Up Next in newsHigh school breaks record for most twins, multiplesFebruary 8, 2018Meet black and white twins, Millie and Marcia March 12, 2018California twins born in different yearsJanuary 2, 2018