Is it normal to lose weight in first trimester?

Yes. Nausea and food aversions can cause slight weight loss. Less than 2-3 kg is not usually concerning.

Pregnancy Weight Gain Calculator — Healthy Weight Gain Guide

IOM Recommended Pregnancy Weight Gain by BMI

Underweight (BMI <18.5): 28–40 lbs (12.5–18 kg)
Normal weight (BMI 18.5–24.9): 25–35 lbs (11.5–16 kg)
Overweight (BMI 25–29.9): 15–25 lbs (7–11.5 kg)
Obese (BMI ≥30): 11–20 lbs (5–9 kg)

Where Does Pregnancy Weight Go?

Healthy Weight Gain Tips

Focus on nutrient-dense foods — not "eating for two"
You need only ~300 extra calories/day in 2nd trimester, ~450 in 3rd
Stay active with pregnancy-safe exercise (walking, swimming, prenatal yoga)
Most weight gain occurs in 2nd and 3rd trimesters

Medical Disclaimer: This tool is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for personalized guidance.

Healthy Pregnancy Weight Gain Guide

Gaining the right amount of weight during pregnancy supports your baby's healthy development and reduces the risk of complications. Too little weight gain can restrict fetal growth, while too much increases the risk of gestational diabetes, preeclampsia, and difficult delivery.

Recommended Pregnancy Weight Gain by BMI

Underweight (BMI <18.5): Gain 12–18 kg (28–40 lbs)
Normal weight (18.5–24.9): Gain 11–16 kg (25–35 lbs)
Overweight (25–29.9): Gain 7–11 kg (15–25 lbs)
Obese (BMI 30+): Gain 5–9 kg (11–20 lbs)
Twin pregnancy (normal weight): Gain 17–25 kg (37–54 lbs)

Where Does Pregnancy Weight Go?

Baby: ~3.4 kg (7.5 lbs)
Placenta: ~0.7 kg (1.5 lbs)
Amniotic fluid: ~0.9 kg (2 lbs)
Uterine growth: ~1 kg (2 lbs)
Breast tissue: ~0.9 kg (2 lbs)
Blood volume increase: ~1.8 kg (4 lbs)
Body fluid & fat stores: ~2.7–4.5 kg (6–10 lbs)

How much weight should I gain per week?

In the second and third trimesters, about 0.5 kg (1 lb) per week for normal-weight women. First trimester gain is usually 1–2 kg total.

Is it normal to lose weight in the first trimester?

Yes — nausea and food aversions can cause slight weight loss in early pregnancy. As long as it's less than 2–3 kg, it's generally not concerning.

What if I gain too much weight in pregnancy?

Talk to your OB-GYN. They may recommend dietary adjustments. Dieting during pregnancy is not recommended — focus on nutrient-dense food choices instead.

Pregnancy Weight Gain Calculator