Week 27 of pregnancy
Updated 25 Oct 2026
Your baby this week
About the size of a small butternut squash
Source: Vinmec – Bảng cân nặng và chiều dài thai nhi theo tiêu chuẩn của WHO
Your baby's development
Your baby is about 36.6 cm long and weighs about 875 grams. Your baby is getting chubbier, with the skin folds filling out with fat under the skin. The organs are also maturing to prepare for life outside.
Your baby can now blink, although they can't see yet. The jaw muscles and tongue are also getting stronger.
At week 27 your baby's hearing has developed to the point where they can tell apart their parents' voices from other sounds in the outside world. Your baby can also taste the flavours of the food you eat through the taste of the amniotic fluid.
Your body
Your uterus keeps growing, so your bump will get much bigger and your body heavier than before. Stretch marks and itching continue because of rapid weight gain. However, you need to tell apart itching from stretch marks and hives. If you get hives, see a doctor for a proper check-up.
Some mums may have mild swelling in both legs, especially the feet and ankles. If the swelling is significant, you need to see a doctor. Fainting and dizziness may continue. Lie down and raise your legs on a pillow when you notice these symptoms.
Your gums are still easily hurt and may bleed. A stuffy nose can be uncomfortable – oh, it's just like having a cold. But it will be fine, keep going!
Advice for you
Avoid standing or sitting in one position for long, and do gentle exercise. You can spend more time relaxing and focusing on positive things. Not only your baby but Momby wants that too. We've already come a long and exciting way together!
Watch the video for this article
Signs that need a doctor now
If you notice any of the signs below, please go to the nearest health facility to be checked by a doctor.
Vaginal bleeding in pregnancy
This sign needs to be checked by a doctor. Please go to the nearest health facility now. If the bleeding is heavy or comes with severe pain or faintness, call the emergency number 115.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Convulsions (fits)
A convulsion in pregnancy is an emergency. Family members should call 115 at once, lay the mother on her side in a safe place and get her to the nearest hospital.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Fever in pregnancy
A temperature above 38°C counts as a fever. Please go to a health facility so a doctor can find the cause and advise on safe ways to bring it down; do not take medicine on your own.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Leaking fluid or waters breaking
Fluid leaking from the vagina may mean the waters are leaking or have broken and needs to be checked by a doctor. Please go to a health facility soon, lying with your head low while travelling.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Severe headache, blurred vision, sudden swelling
Headache with blurred vision, or sudden swelling of the face, hands or eyelids, can be a sign of high blood pressure in pregnancy or pre-eclampsia. This sign needs to be checked by a doctor. Please go to the nearest health facility now.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Reduced or no fetal movement
A clear drop in the baby's movements, or no movement, needs to be checked by a doctor. Please go to the nearest health facility now rather than waiting until tomorrow.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Severe or worsening abdominal pain
Abdominal pain that keeps getting worse, does not ease, or is severe needs to be checked by a doctor. Please go to the nearest health facility now. If the pain is severe with sweating, faintness or bleeding, call 115.
Source: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
Sources
Content advised by our doctors.
- NHS (accessed 22 Oct 2026)
- ACOG (accessed 22 Oct 2026)
- Vinmec (accessed 22 Oct 2026)
- Source for fetal size: Vinmec – Bảng cân nặng và chiều dài thai nhi theo tiêu chuẩn của WHO
- Source for the signs that need a doctor: Bệnh viện Đa khoa Tâm Anh – Các dấu hiệu nguy hiểm trong thai kỳ
This article helps you understand and prepare. It does not replace a check-up. For an answer about your own situation, please ask the doctor who is caring for you.