proportional - one of the quantities in a mathematical proportion. quantity - the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable.
The third trimester is when women should eat around 500 extra calories per day. Special Considerations. While the 300 calorie per day example above is just an example, there are some special cases in which a woman might need to adjust her daily calorie intake to fit her needs.
While guidelines vary, the Institute of Medicine says if you're a healthy weight, you need no additional calories in the first trimester, 340 extra calories a day in the second trimester, and about 450 extra calories a day in the third trimester. If you're overweight or underweight, you'll need more or less than this depending on your weight gain goal. It takes only a couple of glasses of low-fat milk and a handful of sunflower seeds or a tuna sandwich to add enough calories for that last trimester. (But you'll need to eat more if you're having more than one baby.)