A dating scan can typically be performed from 6 weeks of pregnancy. However, for better clarity and more accurate results, it is generally recommended to have it between 8 to 12 weeks.

No, the dating scan is a painless procedure. Some pressure may be applied during the transabdominal scan, but it should not cause discomfort. If a transvaginal ultrasound is necessary, it may feel a little uncomfortable but is generally not painful.

No, the dating scan is primarily used to determine the gestational age, viability, and number of fetuses. Gender determination is typically performed later, during the 20-week anatomy scan or through specialized tests.

The dating scan is highly accurate in predicting the due date, especially if performed between 8 and 12 weeks of pregnancy. The margin of error is usually within 5-7 days, but it can vary depending on the exact timing of the scan and fetal development.