What to expect at 25 weeks pregnant: Baby size + tips

You’re 25 weeks pregnant—congratulations! At 25 weeks pregnant, a baby is roughly the size of a turnip. Babies are roughly 31.8 cm (12.5 inches) from the top of their head to their heel (crown-heel length) and weigh approximately 778 g (27.4 oz). Their sense of balance is improving, and they may start responding to sounds, so talking or singing to them can be a special bonding moment.

You’re nearing the end of your second trimester, and your little one has come a long way. Last week, they reached the age of viability, which is when their chance of survival outside of the womb passed 50%. As each week passes, their chance of surviving a premature birth increases. 

Psst: Find out how many months pregnant you are if you’re still a bit unsure.

At this stage, you might experience backaches or slight swelling as your body adjusts to your growing bump. Staying active with light exercises, wearing supportive shoes, and resting when needed can help ease discomfort. Let’s dive into what to expect at 25 weeks pregnant and share some practical tips for thriving during this exciting phase.

Your baby at 25 weeks

Your baby now has noticeable human characteristics, like hair, skin, and nails. The baby is also starting to plump up and is adding more layers of fat each day. 

Here are the key developments your 25-week fetus is going through:

Nose

At 25 weeks, the part of your baby’s nose that senses smell is starting to function. The baby may even be able to smell scents and odours in the amniotic fluid. 

With this new nasal development, babies can also start taking their first practice breaths. However, since there isn’t any air in the womb, they’re only “breathing” amniotic fluid right now. 

Lungs

The fetus goes through four stages of lung development. This week, the canalicular stage (second stage), which started in week 16, is now complete. The structures responsible for gas exchange have formed and vascularised. 

Hair

The hair on your baby’s head is growing. The lanugo, the soft, thin hair that covers their tiny body, is also now in place. However, it won’t stick around for long. Around the seventh or eighth month of pregnancy, most fetuses will shed their lanugo. 

ALSO CHECK OUT: Pregnancy Due Date Calculator

Your body around 25 weeks of pregnancy

As you approach your third trimester, you may notice new symptoms start to pop up. Here are some common changes your body may be experiencing during week 25 of pregnancy. 

• Restless Legs Syndrome: If you find yourself with a strong desire to move your legs, you might be experiencing restless legs syndrome (RLS). This feeling is more common in the evening, although it can strike at any time. Although it’s not entirely clear what causes RLS, some experts believe it may result from low iron or folic acid levels.  

• Haemorrhoids: More than 50% of pregnant women experience haemorrhoids. They’re a form of varicose veins caused by increased blood flow and the uterus pressing down on the rectum, which causes the veins to swell. Although they’re not dangerous, they can be quite uncomfortable and may cause rectal bleeding. Eating fibre-rich foods and keeping hydrated can help keep haemorrhoids at bay. 

• Carpal Tunnel Syndrome: If your hands and wrists start to feel tingly or numb, you’re likely experiencing carpal tunnel syndrome. During pregnancy, your blood volume increases, causing your wrists to swell and put extra pressure on the nerves. To reduce the symptoms of carpal tunnel, take frequent breaks from repetitive tasks that use your hands or look into buying wrist splints. 

• Thicker hair: Have you noticed that your hair is looking a little fuller these days? You’re not growing more; you’re just not shedding as much as you normally would, thanks to hormonal changes. Enjoy this fullness while it lasts—most women experience hair loss after giving birth.

• Trouble sleeping: As your bump gets bigger, you may start to experience trouble sleeping at night. There are a few things you can do to help get some decent shut-eye. Try to drink more water earlier on in the day. That way, you won’t be interrupted by as many nighttime bathroom trips. Following a regular exercise routine can also help you enjoy a more sound slumber. Lastly, don’t underestimate the power of a comfortable pregnancy pillow. 

Taking care of yourself when pregnant at 25 weeks

Now is as good a time as ever to focus on your health and well-being.

Here are some tips for living your best pregnancy life:

• Keep a journal: Writing your thoughts and feelings on paper can help you understand them better. It’s a great tool for improving your mental health, and it can be a valuable thing to look back on. Journaling can help inspire creativity, relieve stress, and set goals.

• Look into antenatal classes: A great way to prepare for childbirth is to take antenatal classes. Most expectant parents find these classes very beneficial. They provide you with information on labour, birth, and caring for your newborn. Most people take these classes about eight to ten weeks before their baby is due, which is when they are 30 to 32 weeks pregnant. You still have a bit of time before you need to book into anything. But you might find several options in your area, so it’s best to get a head start with looking. 

• Focus on dental health: Did you know there’s actually a link between good dental hygiene and carrying a baby to full term? It’s true. Research has found a connection between expecting women and healthy oral practices. Keeping your mouth clean means you’ll reduce the risk of transmitting bacteria through your blood and amniotic fluid to your fetus. These oral infections can trigger premature delivery. Make sure to brush your teeth at least twice a day and floss regularly. 

• Stay active: Working out prepares your body for the rigours of childbirth. This means women who regularly exercise are much more likely to have a smoother labour and delivery. It’s totally safe to stay active right until the end of your pregnancy. Just remember to choose pregnancy-safe workouts like walking, swimming, and pre-natal yoga. 

FAQ about the 25-week trimester

If you’re still unsure about a few things regarding your 25-week pregnancy, perhaps the answers to the following FAQs might help. 

25 weeks is how many months pregnant?

You’ll be in your sixth month of pregnancy at 25 weeks. 

What is my baby doing at 25 weeks inside the womb?

At 25 weeks, your baby is moving around a lot and has become responsive to touch and sound. Loud noises may cause them to jolt and kick, and you’ll feel this. At this point, the baby is also passing urine into the amniotic fluid regularly. 

How often should my baby kick at 25 weeks?

You should be able to feel at least 10 movements within two hours. Be sure to contact your doctor if you can’t feel 10 movements within two hours to advise you on what to do next. 

What should I avoid at 25 weeks pregnant?

Avoid eating rich, spicy, and fatty foods. Minimise your intake of highly caffeinated drinks such as coffee, energy drinks, and teas. Avoid alcohol and cigarettes at all costs. Sit up straight while eating for better digestion.   

How big is my baby at 25 weeks?

Around this time, your baby is roughly the size of a cauliflower, measuring about 34–35 cm in length (head to heel) and weighing around 650–750 grams. These figures can vary slightly for each pregnancy.

What developments are happening with my baby now?

Your baby’s lungs continue to mature, and they’re practising breathing movements by inhaling and exhaling small amounts of amniotic fluid. Their skin is gradually becoming less translucent, and they may respond noticeably to noises and light.

What pregnancy symptoms are common at 25 weeks?

You may experience Braxton Hicks contractions, occasional shortness of breath, heartburn, mild swelling (especially in the feet and ankles), and possibly back or pelvic pain as your uterus expands.

Is weight gain expected at this stage?

Yes, most women steadily gain weight throughout the second and into the third trimester. The exact amount varies individually. Your healthcare provider can offer personalised guidance based on your pre-pregnancy weight and health.

How can I relieve back or pelvic discomfort?

Maintain good posture, consider gentle exercises like prenatal yoga or swimming, and use supportive cushions or pregnancy pillows. A warm (but not hot) bath can sometimes ease aches as well. If discomfort is severe, consult your doctor or midwife.

Should I be feeling my baby move regularly?

You may notice more distinct and frequent movements as your baby grows stronger. If you sense a significant decrease in activity or feel unsure, contact your healthcare provider for advice.

What about my diet at 25 weeks pregnant?

Focus on nutrient-rich foods like fruits, vegetables, whole grains, lean proteins, and dairy (or alternatives). Iron, calcium, and folic acid remain important. Staying hydrated helps support overall health and can reduce some pregnancy-related discomforts.

Can I still exercise safely?

Moderate, low-impact exercise such as walking, swimming, or prenatal yoga can help maintain fitness, reduce stress, and support healthy weight gain. Always follow the advice of your midwife or doctor, especially if you have any complications.

Are Braxton Hicks contractions normal now?

Yes, Braxton Hicks “practice” contractions are quite common around this time. They’re typically irregular and not too painful. If they become strong or frequent, seek medical advice to rule out preterm labour.

When is my next prenatal appointment likely to be?

Many women have check-ups every four weeks in the second trimester. Your midwife or doctor will let you know the exact schedule and discuss any tests or scans needed, such as checking your glucose levels for gestational diabetes.

What should I do if I’m feeling anxious about labour or parenthood?

It’s natural to have concerns. Consider discussing them at your prenatal appointments, talking with supportive friends or family, or joining antenatal classes. Sharing worries can often help you feel more prepared and reassured.

Next read: Does what you eat in pregnancy matter?