Why is it important to recognize mono- or dichorionicity early? How accurate is ultrasound in making the distinction of monozygous, monochorionic twins based on results of recent studies?

Why is it important to recognize mono- or dichorionicity early? How accurate is ultrasound in making the distinction of monozygous, monochorionic twins based on results of recent studies?

Why is it important to recognize mono- or dichorionicity early in gestation? How accurate-i.e. insensitive-is ultrasound (US) in making the critical distinction of monozygous, monochorionic twins based on results of recent clinical studies?