[Gestational bone age of newborn infants].

A method for bone age calculation for neonates is reported. Criteria for maturation and growth are separately analysed. The chosen X ray charts were thorax including mandibula and profile of the right leg. 126 neonates 28 to 41 weeks of gestational age were studied. A linear regression is given. An area of confidence for growth and maturation for each gestational age has been designed. When gestational age is known, it gives the opportunity to appreciate the impact of a given pathology on these 2 data.