Effect of Maternal Diabetes on Amniotic Fluid Index during the Second and Third Trimesters of Pregnancy: A Sonographic Case-Control Study
Abstract
Purpose: Patients with diabetes are more likely to develop polyhydramnios. The rate of polyhydramnios among diabetic patients is increasing compared to non-diabetic patients.
To compare the Amniotic Fluid Index (AFI) of diabetic and non-diabetic patients using sonography.
Materials and Methods: A case-control study was conducted with 200 participants, comprising 100 diabetic patients and 100 non-diabetic patients. The study utilized a Toshiba XARIO XG ultrasound machine with a convex probe of 3.5-7.5 MHz frequency at the university ultrasound clinic in Green Town. All diabetic and gestational diabetic patients aged 18-45 years in their 2nd and 3rd trimesters were included. Patients with underlying pathologies such as hypertension or multiple gestations were excluded. Data analysis was performed using SPSS version 25.0.
Results: The mean amniotic fluid index in diabetic and non-diabetic groups was 21.19 and 13.20, respectively. The difference in the AFI between diabetics and non-diabetics was statistically significant (p=0.000). Chi-square analysis revealed a significant association between the AFI category and diabetes status. The diabetic group exhibited a higher proportion of cases in the polyhydramnios AFI category and a lower proportion in the normal AFI category compared to the non-diabetic group. The mean estimated fetal weight for diabetics and non-diabetics was 1341.64 and 1372.53 grams, respectively. There was no significant difference in estimated fetal weight between diabetic and non-diabetic patients (p=0.088).
Conclusion: The study concluded that diabetes during pregnancy is significantly associated with increased amniotic fluid levels, leading to a higher likelihood of polyhydramnios.