A plus size pregnancy is a higher risk pregnancy so following weight gain guidelines is necessary. Avoid consuming lots of carbs and stick to healthier carbs such as dairy products, fruits, etc. Reduce intake of refined sugar and starches. Eat small amount of sweets as a planned part of your day. Eat more of lean proteins as it help to prevent excessive pregnancy weight gain. Follow a strict meal schedule. Divide it into three meals and two snacks at a set time.