Quick guide:

• What’s happening with the baby at 18 weeks pregnant?

• How big is your baby at 18 weeks pregnant?

• How is your belly at 18 weeks pregnant?

• Common symptoms and how to manage them?

• Frequently asked questions at 18 weeks pregnant

What’s happening with the baby at 18 weeks pregnant?

Baby’s face and features

By 18 weeks, your baby's face is looking more human-like. The ears, nose, and lips are all well-formed and recognizable on an ultrasound. The eyelids, eyebrows, eyelashes, and even hair are forming. This is when your baby starts to look more like the tiny person they are becoming.

Lungs developing

Your baby’s lungs are also developing during this stage. The smallest airways in the lungs (called bronchioles) are starting to form. These will eventually lead to respiratory sacs at the ends of the airways, which will be essential for breathing after birth. These sacs will help exchange oxygen and carbon dioxide, making it possible for your baby to breathe once they are born.

Reproductive organs

At this stage, if you’re having a girl, her uterus and fallopian tubes are now in place and fully formed. If you’re having a boy, his genitals are clearly visible. This is an important milestone as it’s the point where gender characteristics are physically apparent.

Increased baby movement

You might start to feel your baby move around now. These first movements often feel like small flutters, gas bubbles, or even the sensation of popcorn popping inside you. They’ll become more noticeable and frequent over the next few weeks.

How big is your baby at 18 weeks pregnant?

At 18 weeks pregnant, your baby is about the size of a bell pepper. They are growing rapidly, with their body becoming more proportional. Though still small, they’re already developing key features and moving more frequently! Your baby measures around 22 cm from head to toe and weighs about 223 grams.

How is your belly at 18 weeks pregnant?

At 18 weeks pregnant, your belly is likely becoming more noticeable, and you may be showing a small, round bump. This is a time when many women start to feel like they really "look" pregnant. Your uterus is growing and expanding to accommodate your baby, and it may start to feel firmer, especially if it’s your first pregnancy.

Common symptoms and how to manage them?

1) Increased appetite

Your body is working harder to support your growing baby, so you might feel hungrier than usual. To manage this, try eating healthy snacks like fruits, nuts, or yogurt between meals. This will help keep your energy levels up and prevent overeating at mealtimes. Focus on nutrient-rich foods that will benefit both you and your baby.

2) Heartburn or indigestion

As your baby grows, your uterus may put pressure on your stomach, causing acid to back up into your esophagus. To help manage heartburn, eat smaller, more frequent meals, avoid spicy or greasy foods, and stay upright for at least an hour after eating. Drinking water with a little bit of apple cider vinegar or ginger tea may also help.

3) Back pain

As your body changes and your baby grows, you may start to experience lower back pain. To ease this, practice good posture by standing up straight, using a supportive chair, and avoiding lifting heavy objects. Consider gentle stretches or prenatal yoga to strengthen your back and alleviate discomfort.

4) Increased vaginal discharge

It's normal to notice more vaginal discharge during pregnancy due to hormonal changes. Make sure to wear breathable cotton underwear and avoid using scented products that could irritate your skin. If the discharge has a foul smell or is accompanied by itching or burning, it could be a sign of an infection, so be sure to consult your doctor.

5) Stretch marks

As your skin stretches to accommodate your growing baby, you might notice stretch marks developing on your belly, hips, or breasts. Moisturizing with oils or creams that contain vitamin E or cocoa butter may help reduce itching and keep your skin hydrated, though stretch marks are mostly genetic and may not be completely preventable.

6) Swollen feet or ankles

As pregnancy progresses, some swelling in your feet and ankles is common due to increased blood volume and pressure from the growing uterus. To reduce swelling, avoid standing for long periods, prop your feet up when sitting, and drink plenty of water to stay hydrated.

7) Mood swings

Hormonal changes can cause fluctuating emotions. If you’re feeling a bit more emotional or irritable, try to rest when you can, practice relaxation techniques, and lean on your support system for help. It’s also a good time to talk with your healthcare provider if you’re feeling overwhelmed or down.

Frequently asked questions at 18 weeks pregnant

When will I start feeling my baby move? 

You may start feeling your baby’s first movements, called "quickening," between 16 and 22 weeks. These early movements can feel like little flutters, gas bubbles, or even popcorn popping inside your belly. First-time moms often feel them a bit later than those who have been pregnant before.

How can I make sure I'm getting enough nutrients for my baby? 

During the second trimester, you need about 340 extra calories a day. Focus on eating a balanced diet with plenty of fruits, vegetables, lean proteins, and whole grains. Healthy snacks, like nuts, yogurt, and fruit, can help meet these extra calorie needs while also keeping your blood sugar stable.

When will I have my mid-pregnancy ultrasound?

You will typically have your mid-pregnancy ultrasound between 18 and 22 weeks. This ultrasound checks on your baby’s growth and development, and it may also reveal the baby's sex if you choose to find out.

How do I manage my increasing appetite during pregnancy?

It's normal to feel hungrier during pregnancy. Try eating smaller, more frequent meals to manage hunger and avoid overeating. Opt for nutrient-dense foods to support your baby’s development, and drink plenty of water to stay hydrated.

Are my baby’s organs fully developed at 18 weeks?

At 18 weeks, your baby’s organs are developing rapidly. Their skin is still thin and translucent, but their ears, nose, and lips are already recognizable on an ultrasound. Their lungs are branching out and forming tiny respiratory sacs that will eventually allow them to breathe after birth. If you're having a girl, her uterus is already formed. If you're having a boy, his genitals are visible.

How can I deal with back pain? 

Back pain is common as your body changes and your uterus grows. To manage it, try sitting with good posture, using supportive pillows when resting, and avoiding heavy lifting. Prenatal yoga or stretching can also help strengthen your back muscles and alleviate discomfort.

What should I do if I have any concerns about my pregnancy at 18 weeks? 

If you experience unusual symptoms, like severe pain, bleeding, or a sudden loss of pregnancy symptoms, contact your healthcare provider immediately. They can offer guidance and help ensure everything is progressing well.