Routine first trimester ultrasound scan is done between 11 and 14 weeks as recommended by ISUOG Guidelines. This scan is important to confirm viability, accurately determine gestational age, and to identify singleton and multiple pregnancy.   In the case of a multiple pregnancy, it is crucial to determine chorionicity and amnionicity during this stage as the characterization is most accurate. This will help the Obstetrician with better patient management for example the frequency of ultrasound scan needs to be done will be different according to the types of multiple pregnancies.