Maturity mark
Signs of maturity are clinical features of a newborn that the pediatrician can use to determine the age of maturity of a newborn if there is uncertainty about the actual length of pregnancy. The following characteristics
- Hair status : Lanugo hair formation, physiologically low with free areas
- Skin status : rosy skin, no cyanosis
- Auricles : physiological condition
- Testicular status : physiologically, at least one testicle has descended
- Fingernails : physiologically, the fingernails protrude beyond the fingertips
- Labia status : physiologically, the large labia cover the small labia
- Mammary gland status : diameter about 10 mm, mammary glands clearly visible
- Spontaneous posture: extremities bent, physiological muscle hypertension
- Head hair: physiologically strong, silky
are summarized in different scores , so that a very precise determination of maturity is possible. A clinically established scoring system is the Petrussa index .