O99.4 - Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium
O99.41 - Diseases of the circulatory system complicating pregnancy
O99.411 - Diseases of the circulatory system complicating pregnancy, first trimester
O99.412 - Diseases of the circulatory system complicating pregnancy, second trimester
O99.413 - Diseases of the circulatory system complicating pregnancy, third trimester
O99.419 - Diseases of the circulatory system complicating pregnancy, unspecified trimester