Question 1

What are IOM pregnancy weight gain guidelines?

Accepted Answer

IOM recommends: Underweight (BMI<18.5): 12.5-18 kg; Normal (18.5-24.9): 11.5-16 kg; Overweight (25-29.9): 7-11.5 kg; Obese (>=30): 5-9 kg. These are for singleton pregnancies.

Question 2

What does pregnancy weight gain consist of?

Accepted Answer

Baby (3-4 kg), placenta (0.7 kg), amniotic fluid (0.9 kg), uterus growth (1 kg), breast growth (0.5 kg), increased blood (1.5 kg), fluids (2 kg), and fat stores (2-4 kg).

Question 3

How is weight distributed across trimesters?

Accepted Answer

First trimester: 0.5-2 kg total. Second and third trimesters: about 0.45 kg/week for normal-weight women, slowing slightly near the end.

Question 4

What if I gain too little?

Accepted Answer

Insufficient gain is associated with preterm birth, low birth weight, and impaired fetal brain development. Consult your healthcare provider if you are gaining less than expected.

Question 5

Are these guidelines strict?

Accepted Answer

No, these are guidelines not prescriptions. Individual circumstances vary. Always consult your doctor or midwife who monitors your specific situation.

孕期体重增加计算器

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