Indonesia is ranked 5th in the world and 3rd in Southeast Asia with the highest number of stunted children under five. West Papua Province in 2018 is included in 18 provinces with a high prevalence of around 30% -<40%. Stunting is one of the nutritional problems that occur from the pre-conception period, and will continue until pregnancy which can affect the baby being born. One of the efforts that can be done by giving rebon shrimp, its content which is rich in micronutrients can be an alternative food choice for improving blood biochemistry of pregnant women. The purpose of this study is to analyze the differences in blood biochemical levels of pregnant women (serum protein, serum albumin and hemoglobin levels) before and after consuming the supplementary feeding of Koya Powder made from Rebon Shrimp. This study used a quasi-experimental method with a group design post-test control approach. The total sample size is 15 respondents per group, using the incidental technique. The intervention group was given koya powder as much as 100 grams/day for 7 days, while the control was given education on nutritious foods and eating according to the daily pattern. The research was conducted in the work area of the West Sorong Health Center and Malawili Public Health Center, data collection was carried out from 31 August 2020 to 06 October 2020, using an observation sheet. Data analysis used the Mann-Whitney test, if the data were not normally distributed. If the data were not normally distributed, use the free sample t2 test. The results of the study were significant differences between the control group and the intervention group with a P value of 0.000 <0.05. Conclusion "There is an Effect of Consumption of