The first signs of a normal intrauterine pregnancy can be visualized on ultrasonography after missing the next period for a week only. Ultrasonography will then reveal just the presence of an intrauterine gestational sac without visualizing an embryo. The control check-up a week later should show an embryo and the onset of blood circulation. The growth and development of the fetus, amniotic fluid levels and condition of the placenta are followed by regular ultrasonography. Throughout a normal pregnancy, i.e. pregnancy without any complications, 4-5 ultrasound exams are recommended.
