Week 27 of Pregnancy
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Your baby is the size of: Cabbage
Approximate length37 cm
Approximate weight875 grams
TrimesterSecond
Pregnancy monthSeventh
Baby Size Comparison in Week 27
In week 27 of pregnancy your baby measures about 37 cm long and weighs about 875 grams: roughly the size of Cabbage. 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 27
The end of the second trimester! The fetus sleeps and wakes in a regular pattern you can notice: quiet periods and active periods with strong movements. The eyelids open fully, the lashes are complete, and the fetus can focus its eyes.
The lungs and nervous system are close to mature but need the third trimester to complete. The brain is very active and the folds form quickly. Fat accumulates, so the body rounds out, and the bone marrow produces blood cells efficiently. You may feel hiccups as light, regular, rhythmic jumps; it is the fetus practicing breathing by swallowing fluid. The weight approaches one kilogram.
The fetus sleeps and wakes in a regular pattern you can notice: quiet periods and active periods with strong movements. The eyelids open fully and the lashes are complete, and it can focus its eyes. The lungs and nervous system are close to mature but need the third trimester to complete. The brain is active and the folds form quickly, and fat accumulates, so the body rounds out. You may feel hiccups as light, regular, rhythmic jumps; it is the fetus practicing breathing by swallowing the amniotic fluid.
Your Body Changes in Week 27
Fatigue returns strongly with the third trimester: the heavy belly, back pain, swollen feet, and shortness of breath. Frequent nighttime urination interrupts sleep, and heartburn intensifies.
You may find it hard to walk long distances and feel pelvic pain as the body prepares for birth (ligament softening). Constipation and hemorrhoids are common. Weight gain is about 9 to 13 kilograms. Emotionally: a mix of excitement, anxiety, and exhaustion; rest without guilt and ask for help with heavy housework.
Fatigue returns strongly; rest without guilt. Ask for help with heavy work. Write down emergency numbers and the hospital route. And consider an educational course about birth; knowledge removes fear.
Practical Tips for Week 27
- Start considering an educational course about birth and breastfeeding; knowledge removes fear.
- Take a tour of the hospital where you will deliver; familiarity with the place eases the mind.
- Take a short daytime nap when needed; your body now works for two.
- Prepare a list of emergency numbers, the hospital route, and the birth bag gradually.
Frequently Asked Questions About Week 27
When does the third trimester begin?
The third trimester begins at week twenty-eight and runs until birth. It is marked by the baby's rapid growth (its weight nearly triples), returning fatigue and insomnia, doctor visits increasing to every two weeks then weekly, and serious birth preparations: the hospital bag, the birth plan, and the education course.
Is my baby's size in week 27 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 27?
Week 27 falls in the seventh month of pregnancy (the seventh month = weeks 27-30), within the second 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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