What kind of ultrasound is typically performed first to confirm pregnancy?

The initial ultrasound performed to confirm pregnancy is typically a transvaginal ultrasound. This method is preferred in early pregnancy for several reasons. Transvaginal ultrasound provides a clearer and more detailed image of the early gestational structures, such as the developing embryo and gestational sac, compared to abdominal ultrasound, especially when the pregnancy is less than six weeks along.

The transvaginal approach allows for closer proximity to the pelvic organs, which enhances image resolution and facilitates the identification of conditions like an ectopic pregnancy or signs of miscarriage. In instances where the gestational age is uncertain or if there are concerns about potential complications, transvaginal ultrasound is often the most effective first-line option.

Other types of ultrasound, such as 3D ultrasound and Doppler ultrasound, are not typically used for confirming early pregnancy. A 3D ultrasound is more useful in later stages for assessing fetal anatomy, while Doppler ultrasound is primarily used to evaluate blood flow, which is more relevant in later pregnancy assessments. An abdominal ultrasound, although helpful, may not provide the necessary detail required for confirming a very early pregnancy. Thus, the transvaginal ultrasound stands out as the most appropriate and effective choice for early pregnancy confirmation.