preferred_name: Twin gestation, unspecified number of placenta, unspecified number of amniotic sacs
preferred_name_lc: twin gestation, unspecified number of placenta, unspecified number of amniotic sacs
label: Twin gestation, unspecified number of placenta, unspecified number of amniotic sacs
label_lc: twin gestation, unspecified number of placenta, unspecified number of amniotic sacs