Figure 7

What we do not see can be more important than the visible: Relative contribution of mainly non-photic (shaded) versus mainly photic (white) spectral components in human neonates. The extent of change (double amplitude) of the non-photic, probably circadidecadal Hale cyclicity, a signature of sunspot bipolarity, can exceed that of the usually solely considered yearly component to the population pattern of human neonatal body length. Amplitude ratios were assessed by the variance of each selected component given as percentage of their sum (top) and as amplitude ratios (bottom). Linearly determined is the relative prominence of biological counterparts of about 21-year (Hale) and about 10.5-year (Schwabe) solar activity cycles, with a 5.25-year harmonic assessed to account for any non-sinusoidality; 0.5-year component is counterpart of geomagnetic disturbance cycle. Meta-analysis of Danish National Birth Registry for all children (N = 1,166,206) born from 1973 to 1994 (The Lancet 1998, 352 (26): 1990).