During the first trimester of pregnancy, a unique and dramatic sequence of events occurs that defines the most critical and sensitive period of development: the remarkable transformation of a single cell into a fully recognizable person. Due to the complex sequence of events that accompany the development of the embryo in the first trimester, complications often arise. Approximately 15% of clinically diagnosed pregnancies are spontaneously terminated. The loss rate is estimated to be two to three times higher in very early pregnancy, in so-called biochemical pregnancies.
Currently, ultrasound is the main available method for differentiating between normal and abnormal early pregnancies. With the help of ultrasound up to 11 weeks, complications such as:
• hydatidiform mole,
• anembryony,
• non-developing pregnancy,
• incomplete and complete miscarriages,
• retrochorial hematomas,
• ectopic pregnancy.