Serum CA 125, Progesterone, and βHCG Levels in the Differential Diagnosis of Abortion and Ectopic Pregnancy

In early pregnancy, it is very difficult to distinguish the clinical and laboratory values of normal pregnancies, complete or incomplete abortions, and ectopic pregnancies (1). Late diagnoses can cause troubles that may result in maternal deaths (2). Ectopic pregnancies are still responsible for 10% of maternal deaths in the Western world and are the leading cause of maternal mortality in the first trimester (3). Therefore, they should be diagnosed as soon as possible so treatment can begin.