Compare pregnancy weight gain with broad Institute of Medicine ranges by pre-pregnancy BMI.
Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.
Use pre-pregnancy measurements to select the broad reference range.
Within reference range at week 20 for the normal weight starting group.
Pregnancy weight gain varies. Use prenatal visits and your clinician's guidance to interpret the range, especially for multiple pregnancy or health conditions.
| First trimester | 0.9–1.8 kg |
|---|---|
| Second/third trimester | 0.4–0.5 kg/week |
| Current trimester | Trimester 2 |
| Current weekly rate | 0.4 kg/week |
Reference ranges are based on broad pregnancy weight-gain guidance and do not replace individualized prenatal care.
Practical notes about the inputs, assumptions, and result.
No. It is broad guidance based on pre-pregnancy BMI and pregnancy type. Your prenatal clinician may use other factors.
The reference guidance differs for twin or multiple pregnancy. It still should be interpreted in prenatal care, not used as a standalone target.
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