Our Baby Journey25 weeks pregnant
25 weeks pregnant is about 5½ months. It falls in the sixth month of pregnancy. You are in week 25 of 40, in the second trimester. Here is what is happening with your baby and your body this week.
Your baby is about the size of a cauliflower.
Length: about 34.6 cm (13.6 in) from crown to heel · Weight: about 660 g (1.5 lb)
Your baby at 25 weeks
The baby is gaining fat and its skin is becoming smoother. Hair may be growing on the head.
Your baby's blood vessels, including small capillaries under the skin, are developing and filling with blood, which gives the skin a pinker tone. As fat gradually builds up beneath the skin, your baby's body is starting to look less wrinkled and a bit fuller.
The nostrils, which had been plugged, begin to open around this time, allowing your baby to make breathing movements with the nose as well as the mouth. These movements move amniotic fluid in and out of the airways and are important practice for breathing after birth.
The spine is becoming stronger, with many small bones, joints, and ligaments forming. Your baby's grip continues to improve, and the hands can make fists. Your baby may also respond to your touch through your belly or to familiar voices with movement.
Your body at 25 weeks
Heartburn, back pain, and trouble sleeping are common.
As your uterus pushes upward, it presses on your stomach and relaxes the valve at the top of it, letting acid travel up into your esophagus and causing heartburn. The extra weight in front also changes your posture and strains your lower back. Getting comfortable at night can become harder, especially if you are used to sleeping on your back or stomach. Some people also notice restless legs, a crawling urge to move the legs in the evening. Low iron can make restless legs worse, so mention it to your provider if it bothers you.
Your belly at week 25
In month 6 (weeks 23–27) your bump keeps growing forward and upward, and the top of the uterus is now above your belly button. Fundal height is usually around 23–27 cm, close to the number of weeks.
Belly size and shape vary a lot depending on your build, whether this is your first pregnancy, your baby's position and the amount of amniotic fluid. At checkups your doctor or midwife may measure your fundal height to track your baby's growth, and may arrange an ultrasound if the measurement is quite different from what they expect.
Symptoms at 25 weeks pregnant
- Heartburn and indigestion
- Lower back pain
- Difficulty finding a comfortable sleeping position
- Restless legs in the evening
- Hemorrhoids
- Thicker, shinier hair
Checkups around week 25
If you have not yet had your glucose screening, it may be scheduled now, as it is typically done between 24 and 28 weeks. Some providers also check your blood count for anemia around this stage. Timing and tests vary by country and by your personal health history.
Tips for week 25
- Use pillows to support your belly and back while sleeping.
- Eat smaller meals to reduce heartburn.
- Consider whether you'd like to make a birth plan.
Common symptoms in the second trimester
The second trimester runs from week 14 to week 27. Nausea often eases, energy returns, your bump starts to show, and you will begin to feel your baby move. Not everyone has every symptom, and it is normal for symptoms to come and go. Common ones include:
- A growing bump and weight gain
- First baby movements, usually felt between weeks 16 and 25
- Round ligament pain (sharp pains low in the belly or groin)
- Heartburn and indigestion
- Back ache
- A blocked nose or nosebleeds
- Leg cramps
- Skin changes such as a dark line on the belly or darker patches on the face
Read the full second trimester guide.
When to call your doctor or midwife
Contact your healthcare provider or maternity unit straight away, or get emergency care, if you have:
- Vaginal bleeding
- Severe or persistent abdominal pain or cramping
- A severe headache, blurred vision, or sudden swelling of your face, hands or feet
- A fever of 38°C (100.4°F) or higher
- Fluid leaking from your vagina
- Severe vomiting where you cannot keep fluids down
- Your baby moving less than usual or a change in their pattern of movements (later in pregnancy)
- Regular contractions before 37 weeks
- Pain or burning when you urinate
- Feeling very low, anxious, or having thoughts of harming yourself
Have a question about week 25?
Ask our AI pregnancy assistant about symptoms, nutrition, scans or anything else on your mind this week.
Frequently asked questions
How big is my baby at 25 weeks pregnant?
At 25 weeks pregnant, your baby is about the size of a cauliflower. That is about 34.6 cm (13.6 in) from crown to heel, weighing about 660 g (1.5 lb).
How big is my belly at week 25 of pregnancy?
In month 6 (weeks 23–27) your bump keeps growing forward and upward, and the top of the uterus is now above your belly button. Fundal height is usually around 23–27 cm, close to the number of weeks. Bump size, shape and when you start to show vary a lot from person to person.
What can I take for heartburn at 25 weeks pregnant?
Lifestyle changes often help: eat smaller meals, avoid eating close to bedtime, and limit spicy, fatty, or acidic foods that trigger symptoms. Raising the head of your bed slightly can reduce nighttime heartburn. Some antacids are considered suitable in pregnancy, but check with your doctor, midwife, or pharmacist before taking any medication, including over-the-counter remedies, so they can recommend an option that is right for you.
Should I make a birth plan at 25 weeks?
This is a good time to start thinking about it. A birth plan is a simple record of your preferences, such as who you want with you, pain relief options, positions for labor, and how you would like to feed your baby. It is helpful to discuss it with your provider so you understand what is available where you plan to give birth. Keep it flexible, because labor does not always go as expected.
Is it normal for my baby to move less some days at 25 weeks?
Movements can vary from day to day at this stage, especially as your baby has sleep periods, and you may notice them less when you are busy. As pregnancy progresses, movements should become more consistent. If you notice a clear reduction or change in your baby's usual movements, do not wait until the next day. Contact your doctor, midwife, or maternity unit so they can check on your baby.
What trimester is 25 weeks pregnant?
Week 25 is in the second trimester, which covers weeks 14 to 27.
How many months is 25 weeks pregnant?
25 weeks pregnant is about 5½ months. It falls in the sixth month of pregnancy. The sixth month covers weeks 23 to 27. Pregnancy is about 40 weeks, or roughly 9 months, counted from the first day of your last period.
This page is general educational information and is not a substitute for advice from your doctor or midwife. Every pregnancy is different, and baby sizes are approximate averages. Last updated 2026-11-07. See our medical disclaimer.