At onset of labor (Phase A) serum TT3
and TSH levels were significantly higher
than those of controls at 32 weeks, while
levels of TT4 were non significantly lower
than those of controls. (Table 2).
Immediately after delivery (Phase B) the
serum values of TT4 were significantly lower
and TSH was significantly higher than those
of controls at 32 weeks; however serum TT3
was non significantly higher than that of
controls.
In the study group, values TT3 & TT4
returned to baseline, similar to those of the
controls at 32 weeks in immediate
puerperium (Phase C), while serum TSH
level was significantly higher in puerperium
than that of controls.