Background: In 2018, Basic Health Research (RISKESDAS) reported that East Java was one of the provinces in Indonesia with a prevalence of chronic energy deficiency (CED) in women of childbearing age above the national prevalence (19.6%). Chronic Energy Deficiency (CED) is a nutritional problem that can occur in pregnant women due to inadequate energy and protein intake and needs. Chronic Energy Deficiency (CED) is characterized by a pregnant woman's Mid Upper Arm Circumference (MUAC), which is less than 23.5 cm. Nutritional problems and weight loss in pregnant women can cause a decrease in body resistance, and pregnant women become increasingly susceptible to oxidative stress. This research focuses on examining the correlation between the antioxidant SOD and the administration of DHA to underweight pregnant women.

Methods: The research was conducted using an experimental pre and post-test with 21 samples of underweight pregnant women at Made Community Health Center, Surabaya.

Results: Body weight (P < 0,001); Height (P = 0, 88); BMI (P = 0,003); MUAC (P = 0,003); Systolic BP (P = 0,111); Diastolic BP (P = 0,887); Fundal Height (P = 0,001); SOD (P = 0,013).

Conclusions: In this study, a correlation was found between the supplementation of DHA and the weight, BMI, MUAC, fundal height, and SOD levels in underweight pregnant women.