O99.6 - Diseases of the digestive system complicating pregnancy, childbirth and the puerperium
O99.61 - Diseases of the digestive system complicating pregnancy
O99.611 - Diseases of the digestive system complicating pregnancy, first trimester
O99.612 - Diseases of the digestive system complicating pregnancy, second trimester
O99.613 - Diseases of the digestive system complicating pregnancy, third trimester
O99.619 - Diseases of the digestive system complicating pregnancy, unspecified trimester