The present study is divided into two groups ,one is the patients with subclinical hypothyroidism who has TPO antibody positive women with TSH concentrations \> 2.5 mU/L and below the upper limit of the pregnancy specific reference range ,another is TPO antibody negative with TSH concentrations greater than the pregnancy specific reference range and below 10.0 mU/L.The two groups are randomized into either the LT4 treatment group or control group by the use of a computer-generated list. The aim of our study is to determine whether the use of levothyroxine is beneficial in patients with subclinical hypothyroidism in two groups。
Age range
18 Years – 39 Years
Sex
FEMALE
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Gestational week at delivery
Timeframe: 28 weeks
Newborn birth weight
Timeframe: at birth
APGAR Score at birth
Timeframe: at birth