Background and objectives Thyroid disorders are among the common endocrine disorders in pregnant women. Several changes are observed in maternal thyroid function during pregnancy and failure to adapt to these physiological changes results in thyroid dysfunction. It is now well established that not only overt, but also subclinical thyroid dysfunction also has adverse effects on maternal and fetal outcome. In this study we have excluded women with multifetal gestation, known chronic disorders like diabetes and hypertension, who had bad obstetric history with known cause. There are few data India about the prevalence of thyroid dysfunction in pregnancy. With this background, this study aims to know the prevalence of thyroid dysfunction in pregnancy in Indian population. Methods The present study was conducted in The Department of Gynecology and Obstetrics, Al-Ameen Medical College and Hospital, Bijapur. It is a prospective study which involved screening of 100 pregnant women coming to routine antenatal check up in first trimester. TSH level was estimated. If it is deranged, then FT3 & FT4 levels estimated. Patients were managed accordingly and followed till delivery. Prevalence of Thyroid dysfunction was noted. Result Prevalence of thyroid dysfunction(10%) was high in this study , with subclinical hypothyroidism in (6%) ,overt hypothyroidism in (2%) and subclinical hyperthyroidism in(2%)women ,which is comparable to other studies. CONCLUSION: Prevalence of thyroid disorders, especially subclinical hypothyroidism (6%) and overt hypothyroidism(2%) was high ,emphasizing the importance of routine antenatal thyroid screening.