To find out any association between gestational diabetes mellitus (GDM) and thyroid status (TS) throughout pregnancy in Bangladesh.This study, designed as a cross-sectional study, was performed on randomly chosen 628 patients attending the Ad-Din Women's Medical College antenatal service from January 1 2019 to December 31 2019. After taking a detailed history, oral glucose tolerance test was done for all the participants. If eligible, then thyroid-stimulating hormone (TSH) and free thyroxine (F.T4) tests were done.The mean gestational age in GDM and non-GDM groups was 20.5 ± 9.1 years and 17.5 ± 9.2 years, which were significantly different (Even though GDM and TD are the most prevalent endocrine disorders during pregnancy, neither TS during pregnancy nor any risk factors for TD have been associated with the development of GDM.