In some cases, a pregnant woman is prescribed an unscheduled ultrasound. It may be needed to assess the woman’s condition and prevent possible complications if pathologies or alarming symptoms occur:
• abnormal fetal development;
• discrepancy between the size of the uterus and the gestational age;
• pain in the abdominal cavity;
• bloody issues;
• pathologies of placental maturation;
• absence of movements and other signs of the fetus;
• intrauterine developmental delay of the child.
Additional studies can be prescribed by a specialist at any period of gestation until birth.