To become a midwife consists in acquiring the skills required to global pregnancy follow-up. We are trained to adaptability, both in our radiuses of action and in our modes of exercise. However, some will choose to specialize, notably in ultrasound scan. In that case, how to be trained? How is it feasible to settle down in liberal? l first presented the blue-print law. Then, l studied the practical side of this setting up according to ultrasound scan specialised midwives' testimonies who practise in liberal.