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This guide is for educational purposes only. Always consult your healthcare provider about your pregnancy weight gain.
Pregnancy Progress
Week 12 of 40 (30%)
1-4.5
lbs gained to date
15-25 lbs
total target
Minimal
lbs/week rate
No change
cal/day extra
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The fetus is the size of a lime. Reflexes develop. Fingernails start forming. End of the first trimester.
End of the first trimester. Miscarriage risk drops significantly.
Critical for neural tube development. Prevents birth defects of the brain and spine.
Supports increased blood volume and prevents anemia. Needs increase throughout pregnancy.
Supports calcium absorption and bone development. Many women are deficient.
Supports developing bones and teeth. Your body will pull from your bones if intake is low.
No extra calories needed
During the first trimester, your calorie needs do not increase. Focus on nutrient quality over quantity.
At week 12 with Overweight BMI (BMI 25-29.9), the IOM recommends a total gain of 1-4.5 lbs so far. Your overall pregnancy target is 15-25 lbs.
For Overweight BMI at week 12, a healthy gain is 1-4.5 lbs total. If you are outside this range, talk to your healthcare provider. Individual variation is normal.
During the first trimester, you need about no additional extra calories per day above your pre-pregnancy intake. This supports fetal growth and your increased metabolic needs.
During the first trimester (week 12), key nutrients include iron (27 mg/day), calcium (1,000 mg/day), and vitamin D (600 IU/day). A prenatal vitamin covers most needs.
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