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Week 18 of Pregnancy | Pregnancy Power Hour
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Pregnancy · Trimester 2

Week 18 of Pregnancy

Week 18 often brings the excitement of the anatomy scan, offering a detailed look at your baby's development and a chance to feel their movements more regularly.

3 min read

Quick answer

Week 18 often brings the excitement of the anatomy scan, offering a detailed look at your baby's development and a chance to feel their movements more regularly.

On this page
  1. What's happening with baby
  2. What you might be feeling
  3. A doula's lived take
  4. Questions worth asking your provider
← Week 17Week 18 of 40Week 19 →

What's happening with baby

At 18 weeks, your baby is growing steadily, now about the size of a bell pepper, measuring around 142mm from crown to rump. This week marks significant advancements in their internal systems. Their nervous system is rapidly maturing, allowing for more coordinated movements. You might notice these movements more distinctly now, as they're practicing stretches, kicks, and even somersaults within the amniotic fluid.

Their tiny ears are developing further, making them more sensitive to sounds from the outside world – your voice, your partner's voice, and even music. Evidence suggests that babies can begin to recognize familiar voices even before birth. Unique fingerprints and toe prints are also forming, a truly individual detail that will be theirs alone. It's a remarkable time of intricate development, preparing them for life outside the womb.

What you might be feeling

Many parents in their second trimester find a renewed sense of energy, often a welcome shift from the fatigue of the first trimester. Your belly is likely becoming more prominent, a beautiful sign of the life growing within you. With this growth, you might experience some mild aches, like round ligament pain, as your uterus expands. Gentle movement and stretching can often offer comfort here.

Perhaps the most exciting development this week is the increasing likelihood of feeling your baby move. These first flutters, often described as 'quickening,' can feel like gas bubbles or gentle taps. For some, it's a clear kick; for others, it's a subtle sensation that grows more distinct over time. It's a deeply personal experience, and the timing can vary widely from person to person.

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A doula's lived take

As a doula, I've seen how this week can be a powerful turning point for many parents. The anatomy scan is a significant milestone, offering a detailed glimpse into your baby's health and development. It's a chance to connect with your baby in a new way, seeing their tiny heart beat and their features forming. It's also a time when you might start to feel more connected to the physical reality of pregnancy, especially as those first movements become more consistent.

This is a wonderful time to lean into curiosity and self-care. Pay attention to those subtle movements – they're a unique conversation between you and your baby. Consider how you might want to prepare for your anatomy scan; perhaps you'd like to have a list of questions ready for your provider, or discuss with your partner how you both want to experience this moment. Remember, you get to decide how you engage with each step of your pregnancy journey. My role in our virtual consultations is to help you feel calm, clear, and confident in those decisions, offering evidence-based information and a non-judgmental space to explore your options.

Questions worth asking your provider

As you approach or experience your anatomy scan, it's an excellent opportunity to engage with your care provider. Here are some questions you might consider asking:

  • "What exactly will you be looking for during the anatomy scan?"
  • "Are there any specific measurements or observations that are particularly important at this stage?"
  • "What should I expect regarding the results of the scan, and when will we discuss them?"
  • "What are common variations in fetal movement, and when should I be concerned?"

Your provider is your best resource for your specific situation, and having these conversations can help you feel more informed and empowered.

Baby is about the size of a bell pepper.

Common questions

What is the anatomy scan for?+

The anatomy scan, often performed between 18-22 weeks, is a detailed ultrasound to assess your baby's growth, development, and overall health. It checks organs, limbs, and the placenta, offering a comprehensive look without being diagnostic. It's a wonderful opportunity to see your baby and gather more information.

When should I expect to feel baby move?+

Many first-time parents begin to feel 'quickening' between 18-22 weeks, though it can vary. These initial flutters are often subtle, like gas or butterflies. If you haven't felt movement yet, it's often within the normal range. Your provider can offer reassurance and guidance specific to your pregnancy.

Brittany Nance

“Pregnancy is under-supported at every week. This is the kind of clear, calm guidance I give my one-on-one clients — and the questions worth taking back to your provider.”

Brittany Nance · Pregnancy Wellness Consultant · full-spectrum doula

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Written by Brittany Nance, Pregnancy Wellness Consultant· BADT Full Spectrum Doula · Founder, Pregnancy Power Hour
Last reviewed July 1, 2026

This is evidence-informed education from a birth-doula perspective, not medical advice. Always discuss your individual situation with your prenatal care provider.

On this page

  1. What's happening with baby
  2. What you might be feeling
  3. A doula's lived take
  4. Questions worth asking your provider

Keep reading

  • RelatedWeek 17 of PregnancyAt Week 17, your baby is steadily growing, developing essential fat layers, and you might notice your belly becoming more distinctly visible.
  • RelatedFood Aversions at 18 Weeks PregnantAt 18 weeks, food aversions often begin to ease as first-trimester hormonal shifts stabilize, allowing for a more varied intake.
  • RelatedBaby Movement at 18 Weeks PregnantAt 18 weeks pregnant, you're likely entering the exciting phase of feeling your baby's first movements, often described as gentle flutters or gas-like sensations.
  • RelatedWeek 19 of PregnancyThis week, your baby's sensory development is accelerating, deepening your connection as you both continue to grow and adapt.
  • RelatedFood Cravings at 18 Weeks PregnantAt 18 weeks pregnant, food cravings are a common and varied experience, often influenced by hormones and taste changes, and can be managed with balanced choices.
  • RelatedWeek 16 of PregnancyAs your baby grows to the size of an avocado, you might start to feel those first fluttery movements, often called quickening, marking a beautiful new connection.