An ultrasound examination during this period is necessary to confirm pregnancy. Now the processes of embryogenesis are just beginning, but on ultrasound you can already see the fertilized egg attached to the wall of the uterus.
At week 3, a study may be prescribed in certain cases:
• diagnosis of ectopic pregnancy;
• hydatidiform mole is a rare pathology of the ovum, characterized by the absence of an embryo in the presence of all symptoms of pregnancy. The reason is that the structure necessary for the attachment of the fertilized egg in the uterus (trophoblast) degenerates into a huge number of small bubbles;
• doubts about pregnancy - signs of pregnancy are unclear.