O99.281 - Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimester
O99.2 - Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium O99.28 - Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium O99.281 - Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimester