O30.1 - Triplet pregnancy
O30.12 - Triplet pregnancy with two or more monoamniotic fetuses
O30.121 - Triplet pregnancy with two or more monoamniotic fetuses, first trimester
O30.122 - Triplet pregnancy with two or more monoamniotic fetuses, second trimester
O30.123 - Triplet pregnancy with two or more monoamniotic fetuses, third trimester
O30.129 - Triplet pregnancy with two or more monoamniotic fetuses, unspecified trimester