The fetal zone occupies 80% of the adrenal cortex at term. There is remodelling after birth, with a rapid diminution in the size of the FZ. Reduction in the size of the FZ is mirrored by a fall in DHEAS levels in infants born at term, but FZ androgen production persists in infants born prematurely, and may be linked to maturation rather than birth. The large number of circulating steroids in the newborn period can interfere with hormone assays, and this can make interpretation of results difficult.
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Once your pregnancy is over and done with, your baby is happily in your arms, and youre headed back home from the hospital, youll begin to realize that things have only just begun. Over the next few days, weeks, and months, youre going to increasingly notice that your entire life has changed in more ways than you could ever imagine.