Body Mass Index and Serum Thyroid Stimulating Hormone in Third Trimester of Pregnancy.

Pregnancy is a natural physiological state with hormonal and metabolic changes that helps the growth and survival of the fetus. Adequate body mass index (BMI) in pregnancy is important for securing, protecting and promoting the health of women and newborns. High or low maternal body mass index is associated with adverse outcome. Thyroid physiology plays a major role in pregnancy and thyroid disorders constitute one of the most common endocrine disorders in pregnancy. To assess the levels of body mass index and serum thyroid stimulating hormone (TSH) in third trimester of pregnancy in order to compare these parameters with non-pregnant women of same age range. This analytical type of cross sectional study was carried out in the Department of Physiology, Mymensingh Medical College, Bangladesh from January 2019 to December 2019. A total number of 140 subjects, age range between 20-35 years were included in this study. Among them, 70 healthy subjects were taken as control group (Group I) and 70 pregnant women of third trimester were taken as study group (Group II). The results were calculated and analyzed by using SPSS. Quantitative data were expressed as mean (±SE) and statistical significance of difference among the group was calculated by unpaired student's 't' test. In this study we found that BMI was 27.87±1.9kg/m² and serum TSH level was 2.27±1.18μIU/ml in study group. Both (BMI & TSH) are significantly increased in study groups in comparison with control group. Therefore, by this study we recommended that routine estimation of these parameters is important for prevention of complication related to pregnancy.