Connecticut high school ties the Guinness World Record for most sets of twins in a class . Comment: `` There 's no question that the number and rate of multiple births has increased substantially in recent years , '' Joyce Martin , an epidemiologist at the National Center for Health Statistics ( NCHS ) , explains . Multiple births have increased due to older age of mothers , increased use of infertility therapies .
Connecticut high school ties the Guinness World Record for most sets of twins in a class . Comment: Multiple births have increased due to older age of mothers , increased use of infertility therapies .