This can be confirmed, ideally, by a first trimester ultrasound, if the menstrual period is unknown, then an ultrasound may be performed to establish a due date. First trimester ultrasounds are very accurate in determining the due date. Dian Tossy Fogle More Quotes by Dian Tossy Fogle More Quotes From Dian Tossy Fogle My concern with this study is that it will increase health care costs with no clinical benefit, if the goal is to reduce 'maternal anxiety' regarding timing of delivery, a simple physical exam of the cervix performed at a routine OB visit can also give a patient an idea of how soon they will deliver. Dian Tossy Fogle health-news