The relationships between anthropometric indices and the hormonal status in ontogenesis were investigated in newborns (137 girls and 151 boys aged 1.5-15); the venous blood levels of cortisol, corticosterone, testosterone, estriol, estradiol, progesterone, triiodothyronine, thyroxin, thyroxin-binding globulin, insulin and somatotropic hormone were determined by radioimmunoassay. At the time of investigation all the infants were practically healthy. Information on body mass and length was obtained from form 112 (Child's Development history). The results have shown that testosterone in boys was genetically determined stronger than in girls. Gene control of body mass and length in the intrauterine period is exercised with the help of the endocrine system. Periodic changing of the dominant genes at subsequent stages of ontogenesis leads to a changed role of certain hormones, directly regulating growth processes.
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