Infants are obligate nose breathers - they cannot breathe through their mouths at birth. It is common for neonates to sneeze frequently. Thin white mucus is common. Observations Norms Circumference 31 cm. Equal anterior-posterior and lateral diameters.
Chest is almost circular.
Slight intercostal retractions are normal. Clavicles Intact without lumps or masses Check for bumps, clavicle may have been broken during birth. Should be smooth. Breast Tissue 5 - 6 cm Breast of the newborn of both sexes may be swollen the first few days due to high level of maternal hormones. These are both normal and will disappear without treatment by 4-6 weeks of age.