免费孕期体重增长计算器
根据孕前BMI计算孕期推荐体重增长范围。
Recommended Gain (Low)
25 lbs
Recommended Gain (Low) vs Pre-Pregnancy Weight
公式
## IOM Pregnancy Weight Gain Guidelines | Pre-Pregnancy BMI | Recommended Gain | |---|---| | Underweight (<18.5) | 28-40 lbs | | Normal (18.5-24.9) | 25-35 lbs | | Overweight (25-29.9) | 15-25 lbs | | Obese (30+) | 11-20 lbs | Most weight gain occurs in the second and third trimesters, with about 1-2 lbs per week being typical for normal-weight women.
计算示例
A 140 lb, 65-inch tall woman at 20 weeks pregnant.
- 01Pre-pregnancy BMI = (140 x 703) / (65 x 65) = 23.3 (Normal)
- 02Recommended total gain = 25-35 lbs
- 03Expected by week 20 = 25 x 0.25 + (25 x 0.75) x 7/27 = 6.25 + 4.9 = 11.1 lbs (low end)
常见问题
How much weight should I gain during pregnancy?
It depends on your pre-pregnancy BMI. Normal-weight women should gain 25-35 lbs. Overweight women 15-25 lbs. Underweight women 28-40 lbs.
When does most weight gain occur?
About 25% of total gain occurs in the first trimester. The remaining 75% occurs in the second and third trimesters.
Is it dangerous to gain too much weight?
Excessive weight gain increases risk of gestational diabetes, preeclampsia, cesarean delivery, and postpartum weight retention. Talk to your provider about your target.
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