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This guide is for educational purposes only. Always consult your healthcare provider about your pregnancy weight gain.
Pregnancy Progress
Week 4 of 40 (10%)
0.3-1.5
lbs gained to date
15-25 lbs
total target
Minimal
lbs/week rate
No change
cal/day extra
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The embryo is about the size of a poppy seed. Limb buds appear. The heart begins beating.
Your first prenatal appointment is typically scheduled around this time.
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.
If you are gaining more than the recommended 15-25 lbs for Overweight BMI, talk to your provider. Focus on nutrient-dense foods, regular gentle activity, and avoid restricting calories without medical guidance.
If your gain is below the 15-25 lb range for Overweight BMI by week 4, discuss it with your provider. Inadequate gain can affect fetal growth. Small, frequent, calorie-dense meals may help.
Most women can safely exercise during week 4. Walking, swimming, and prenatal yoga are excellent options. Aim for 150 minutes of moderate activity per week. Always consult your healthcare provider first.
Women with lower pre-pregnancy BMI need more weight gain to support a healthy pregnancy. Overweight BMI (BMI 25-29.9) has a target of 15-25 lbs because this range optimizes outcomes for both mother and baby.
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