O30.0 - Twin pregnancy
O30.01 - Twin pregnancy, monochorionic/monoamniotic
InclusionTerm:
-Twin pregnancy, one placenta, one amniotic sac
Excludes 1:
-conjoined twins O30.02-)
O30.011 - Twin pregnancy, monochorionic/monoamniotic, first trimester
O30.012 - Twin pregnancy, monochorionic/monoamniotic, second trimester
O30.013 - Twin pregnancy, monochorionic/monoamniotic, third trimester
O30.019 - Twin pregnancy, monochorionic/monoamniotic, unspecified trimester