Week 30 of Pregnancy

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Your baby is the size of: Cucumber

Approximate length40 cm
Approximate weight1.3 kilograms
TrimesterThird
Pregnancy monthSeventh

Baby Size Comparison in Week 30

In week 30 of pregnancy your baby measures about 40 cm long and weighs about 1.3 kilograms: roughly the size of Cucumber. Remember these are approximate averages from standard growth charts; every baby grows at their own pace, and your doctor follows your baby's personal growth curve across visits, not a single number. If an ultrasound measures a little bigger or smaller than average, that is usually normal as long as growth continues at a steady rate.

Baby Development in Week 30

Bone marrow growth is complete and it now produces blood cells at full capacity, and the fetus can regulate its body temperature on its own thanks to the accumulated fat. Fat accumulates under the skin, so the skin becomes smooth, pink, and less wrinkled.

The brain grows quickly and stores information; the fetus remembers familiar sounds. The lungs are nearly ready but benefit from every extra week. The eyes are open and react to light. Space is very tight in the womb; movements have become twists and stretches more than kicks. The weight is about 1.3 kilograms and the length 40 cm.

Bone marrow growth is complete and it now produces blood cells at full capacity, and the fetus regulates its body temperature on its own thanks to the accumulated fat. The skin becomes smooth, pink, and less wrinkled. The brain grows quickly and stores information; the fetus remembers familiar sounds. The lungs are nearly ready but benefit from every extra week, and the eyes are open and react to light. Space tightens greatly; movements have become twists and stretches more than kicks. The weight is about 1.3 kilograms and the length 40 cm.

Your Body Changes in Week 30

Shortness of breath is clear, especially when lying down or exerting yourself; the uterus presses on the diaphragm. Sleep has become a real battle: insomnia, frequent urination, heartburn, and strong baby movements.

Foot, ankle, and hand swelling in the evening is common, and back pain and acidity continue. You may feel tingling in the pelvis as the baby's head gradually descends. Weight gain is about 11 to 15 kilograms. Emotionally: exhaustion makes birth seem frightening and welcome at once; focus on practical preparation, for it brings a feeling of control.

Prepare the hospital bag and the car seat now. Save emergency numbers in your phone. Shortness of breath improves with sitting upright. And keep counting kicks; it is your most important indicator.

Practical Tips for Week 30

Frequently Asked Questions About Week 30

When do I prepare the hospital bag?

Best to prepare it between weeks 32 and 35 so you are ready for any emergency. Its basics: ID card and pregnancy file, comfortable clothes for you and the newborn, special postpartum pads, diapers and wipes for the baby, a phone charger, and light snacks. Put it by the door and tell your partner where it is; labor may surprise you before the due date.

Is my baby's size in week 30 the same in every pregnancy?

No. The lengths and weights shown are approximate averages from standard growth curves, and every baby grows at their own pace. What matters is your baby's personal growth curve across checkups: steady growth at a consistent rate is the reassuring sign, not any single number.

What month am I in during week 30?

Week 30 falls in the seventh month of pregnancy (the seventh month = weeks 27-30), within the third trimester.

⚕️ Medical note: Medical note: results are for guidance and do not replace your doctor. If your cycles are irregular or yours is a high-risk pregnancy, always consult your doctor.
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Last reviewed: 2026-10-07

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