The lowest PTH concentrations corresponded to summer (CPP group: 37.7 ± 14.9 pg/mL and control group: 23.6 ± 6.5 pg/mL) and reached a maximum value in autumn (CPP group: 50.2 ± 17.1 pg/mL and control group: 35.1 ± 12.9 pg/mL). Here, PTH is linked to central precocious puberty.