Dr. Susan Black at the Washington National Hospital.

She is not only experienced, but also extremely reassuring and pleasant. She managed to keep me distracted throughout the procedure and I barely felt anything (I'm normally terrified of needles). Her stories about other procedures and her own grandchild also made me at ease and assured that there was little risk to my baby. At the end, my husband and I got a warm hug. They also have excellent ultrasound so the entire experience, preceded by some 20 minutes of our baby on the screens, was great (especially in retrospect after we got the results).