How does NUTRIMI calculate energy during pregnancy?

For a singleton pregnancy, when profile data and safety checks permit calculation, NUTRIMI estimates basal metabolism from pre-pregnancy weight, applies activity and adds 0 kcal in trimester one, 350 in trimester two and 460 in trimester three.

How does NUTRIMI calculate breastfeeding requirements?

The software uses the 2023 TEE equations with age, height, weight and activity, then adds 400 kcal for exclusive feeding in the first six months, 330 for mixed feeding, 380 in months 6 to 12 and 335 after 12 months.

How does NUTRIMI handle missing or inconsistent data?

The calculation pauses and the interface identifies the data to correct or complete before producing a result.

Verifiable calculation method

Pregnancy and breastfeeding change energy and macronutrient needs.

NUTRIMI applies declared formulas.
It calculates energy and macros for each stage.
Required data, steps and sources remain available.

See the calculation Read the sources

BITE points to a calculated nutrition target — **Traceable calculation**Each result exposes its stage, inputs and references.

Technical authorDiego Russo
Verified2 August 2026
Production codeRules checked in the implemented services
SourcesLARN V, NASEM, Italian Ministry of Health

Singleton pregnancy

Due date, pre-pregnancy weight and consistency checks.

The due date determines gestational week and trimester. Pre-pregnancy weight feeds the basal-metabolism calculation and activity produces total expenditure. The energy increment is 0 kcal/day in trimester one, +350 in trimester two and +460 in trimester three. Protein starts from 0.90 g/kg, with increments of +1, +8 and +25 g/day in the three trimesters.

Required data

Active singleton pregnancy, plausible due date, valid pre-pregnancy weight, age, height and activity.

Output

Week, trimester, energy, energy increment, protein, carbohydrate and fat.

Data check

If essential data are missing or fall outside supported ranges, automatic calculation pauses and requests a review.

Lactation

Postpartum stage and feeding mode change the calculation.

Baseline energy uses the National Academies 2023 TEE equations with age, height, weight and activity. The increment is +400 kcal/day for exclusive feeding in the first six months, +330 for mixed feeding, +380 from 6 to 12 months and +335 after 12 months. Protein starts at 0.90 g/kg and adds 20 g in the first six months and 13 g thereafter; fat starts at 30% of energy and carbohydrate is constrained to 45-60%.

Separate stages

First six months, second six months and extended lactation derive from the actual birth date.

Consistency check

The result appears within the 20-35% energy-from-fat range. Data outside that range require review.

Coherent result

Missing or inconsistent data pause the calculation and prompt correction.

The professional completes the picture.

The portal brings multiple pregnancies, medical conditions, treatments, complications and individual goals into professional follow-up.

Explore the professional portal

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