Congratulations—you’re 18 weeks pregnant! Even though it might start feeling like you’ll be pregnant forever, at 18 weeks pregnant, you’re almost halfway through. With that in mind, let’s dive into everything you need to know about the upcoming week.
Your baby is now about 14cm, weighing 190g, and the size of a sweet potato, and their senses are developing rapidly. It’s an exciting stage as you might start feeling your baby’s first fluttering movements, known as quickening for the first time, , as your baby begins to stretch and explore their growing space. From getting ready for your ultrasound to prepping some healthy mid-pregnancy snacks, this is a very active part and one that’s super exciting.
This week, focus on staying active with gentle exercises, eating nutrient-rich foods, and getting enough rest. As your bump grows, embracing self-care is key to staying comfortable and enjoying your pregnancy journey. Let’s dive into what you need to know and some tips to make this stage memorable.
Your baby at 18 weeks
Settling into your pregnancy at 18 weeks brings many changes and speeds up your baby’s development.
Reflexes
Your baby is flexing their muscles, swallowing, chewing, yawning, and hiccupping. With all the kicks, twists and moves, you will surely feel signs of your little acrobat moving around in there.
Development
Your baby’s development at 18 weeks is gaining momentum. Their ears are now in place but not quite flush against the head, and your baby’s lungs are developing tiny bronchioles and alveoli (air sacs) for life outside the womb. The male and female genitalia are fully developed, but your baby may hide these in an ultrasound.
Nervous system
It’s around 18 weeks pregnant that your baby should start kicking, indicating that its nervous system is finding its way. During this period, the nerves are also covered by myelin, a protective insulation that speeds up the messages between nerve cells.
Your body after 18 weeks of pregnancy
Pregnancy at 18 weeks does have various effects on your body, and it’s always a good idea to stay informed about what to expect.
Here’s what you might be experiencing:
- Stretch marks
- More bodily fluids, such as sweat and mucous, owing to your increased blood flow
- A feeling of being a little off balance as your centre of gravity is changing while your belly develops
- Backache
- Low blood pressure, which can lead to dizziness, feeling faint, and fatigue
- Swollen hands and feet (chat to your doctor if you have a sudden onset of swelling)
Taking care of yourself during this time
With what to expect at 18 weeks pregnant out of the way, here are some super valuable self-care tips that mothers have been praising for years.
- Start sleeping on your side rather than your back so that your uterus doesn’t press on the large blood vessels in your back.
- Try to maintain a healthy and balanced diet as much as possible, but don’t deprive yourself either.
- Drink plenty of water.
- If you’re struggling to fall asleep, use bed pillows or a pregnancy pillow to relieve pressure points.
- Get up slowly from a seated or lying position.
- Avoid standing for long periods of time.
- Don’t lift anything heavy.
Frequently asked questions about an 18-week pregnancy
Still stuck with some questions? These are answers to a few of the most popular 18-week pregnancy questions.
What should be happening at 18 weeks pregnant?
During the 18th week of pregnancy, your baby should have eyebrows, hair, and fingernails while beginning to yawn and hiccup. Their nervous system also starts to undergo significant changes.
Where is my baby at 18 weeks in my stomach?
Considering your 18-week fetus is the length of a cucumber as it starts moving around, you should feel it about one and a half inches below your belly button.
Should I feel pregnant at 18 weeks?
Yes, your 18-week pregnancy symptoms should start to be more prominent but will come and go, while your baby bump will definitely begin to show.
How big is my baby at 18 weeks?
By around 18 weeks, your baby is approximately the size of a bell pepper, measuring about 14–15 cm from head to bottom. They continue to gain weight and strengthen their movements.
What developments are happening with my baby this week?
Your baby’s ears are in the correct position, and they may start to hear sounds and voices. They’re also refining their facial muscles, which can lead to yawning, hiccupping, or making various facial expressions.
Which pregnancy symptoms might I notice at 18 weeks?
Many women feel increased energy, although you might still experience mild swelling, backache, or round ligament pain. Some also notice changes in their skin or hair due to hormonal shifts.
Can I feel my baby move at 18 weeks?
Yes, many women experience “quickening” or light kicks around this time. If you haven’t yet, it’s not unusual for first-time mums to feel movement a bit later, around 20 weeks or so.
What if I experience dizziness at 18 weeks?
Dizziness can happen due to increased blood volume and hormonal changes. Staying hydrated, eating regular meals, and moving slowly from sitting or lying positions can help reduce light-headedness.
Is weight gain expected now?
Yes, gradual weight gain is typical throughout the second trimester. Your healthcare provider can give guidance on what’s healthy for your body and pregnancy.
How can I manage back pain or discomfort?
Maintain good posture, consider prenatal yoga or gentle stretching, and use a pillow for extra support while sleeping. If back pain is severe or persistent, consult your healthcare provider.
What dietary choices should I focus on at 18 weeks?
Continue prioritising nutrient-dense foods, including fruits, vegetables, whole grains, lean proteins, and dairy (or alternatives). Ensure you’re getting sufficient iron, calcium, folic acid, and other essential nutrients.
Is it safe to continue or start exercising?
Moderate, pregnancy-safe exercise is usually beneficial if there are no medical complications. Walking, swimming, and prenatal yoga can help maintain fitness and relieve stress. Always check with your midwife or doctor for personalised advice.
When might I have my next ultrasound or mid-pregnancy scan?
Many women undergo an anatomy scan between 18 and 20 weeks. This detailed ultrasound checks the baby’s development, measures growth, and can sometimes reveal the baby’s sex if you wish to know.
How can I handle stress and anxiety at this stage?
Try techniques like deep breathing, mindfulness, and gentle exercise. Share concerns with your partner, friends, or a professional, and consider antenatal classes or support groups for reassurance and information.
What if I have concerns about my pregnancy at 18 weeks?
If you notice unusual symptoms, persistent pain, or anything that worries you, contact your healthcare provider for advice. They can provide guidance, conduct checks, and help ensure you and your baby remain healthy.
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