Serum AMH concentrations in absolute values (pmol/L) (a) and standard deviation scores (SDS) (b) according to age. Dots indicate individual values and longitudinal courses are connected by lines. At each age group, i. e infancy, mid-childhood, puberty and adolescence, median and IQR is marked with black diamants and brackets. All girls were divided into AMH quintiles (5 groups), based on the individual mean SD scores. Blue: 1st quintile, red: 2nd, 3rd, 4th quintile, green: 5th quintile.