Week 15 of pregnancy
Updated 25 Oct 2026
Your baby this week
About the size of an apple
Source: Vinmec – Bảng cân nặng và chiều dài thai nhi theo tiêu chuẩn của WHO
Your baby's development
Weighing about 70 grams and about 10cm long, the size of a pear. Your baby's body keeps growing compared with last week. The eyes, nose, mouth and ears are gradually becoming more refined. Your baby's eyelids are still closed but can gradually sense light from outside. Your baby can also hear sounds both inside and outside your tummy.
Your body
You have reached week 15 of pregnancy. This is the stage when you need to gain more weight. The ideal weight gain is 0.3 - 0.5kg per week to ensure a healthy pregnancy.
Red, swollen or bleeding gums may appear at this stage. This is also caused by pregnancy hormones. Take extra care of your teeth and mouth, and choose a soft toothbrush to avoid damaging your teeth.
You may have heartburn and indigestion; this can be eased by eating several small meals a day instead of 2 – 3 meals.
Some mums also feel dizzy and may faint. Sitting down and getting into a position as if you were tying your shoelaces will help prevent fainting. Mild pulling pains in the lower tummy also happen from time to time
You may be forgetful, even forgetting your doctor's appointments ( use Momby's reminder feature! ). This is because during pregnancy your brain cells decrease, not by much, but enough to affect your memory and thinking a little.
Advice for you
Remember to have a light snack before exercising. Make breakfast a priority. There isn't much specific advice for this time, but what you need is positive, optimistic thinking and a sensible amount of rest. Momby is sharing in your happiness right now. Let's carry on the journey together. Momby believes that if your baby could talk, they would want to say the same thing, though of course more briefly, like I love you, Mummy.
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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)
- Vinmec (accessed 22 Oct 2026)
- Bệnh viện Từ Dũ (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.