Week 18 of Pregnancy

Starting this week, your baby’s brain begins developing rapidly—about 90 grams each month. The head now makes up one-third of the total body length. Measuring around 20 cm and weighing about 220 grams, your baby is roughly the size of a bell pepper. Let’s take a closer look at what’s happening during this stage.

What’s happening with your baby at 18 weeks

By week 18, many mothers may begin to feel their baby’s first kicks. If you don’t notice anything yet, don’t worry, many women don’t feel clear movements until around week 20 or later. At first, these movements are very subtle, but as your baby grows, they will become stronger and more noticeable, especially in the evenings.

Your baby enjoys moving inside the womb and can spend up to 90% of the time in motion, though the average is closer to 20%. Each baby is active in their own way, and this has nothing to do with gender. Later in pregnancy, most mothers can feel 9 out of 10 of their baby’s movements—unless the placenta sits in a position that cushions some of the kicks.

At this stage, your baby is developing a sense of touch and becoming more aware of their own movements. Visual development is also beginning, though eyesight will continue to mature after birth. It’s perfectly normal for newborns to have some crossed eyes, as they are still learning to coordinate and focus.

What’s happening to your body at week 18

During pregnancy, your body tends to retain more water, which can cause mild swelling in your hands, feet, or even your face. Resting adequately while staying gently active can help ease discomfort. You might also try placing cucumber slices on your eyes to refresh the skin around them. Don’t be too critical of your appearance, many people will notice your radiant glow and healthy, looking skin during this time.

Hormonal changes, posture shifts from a growing belly, and looser supporting tissues can also lead to pelvic discomfort. Pay attention to your body and adjust your daily activities when necessary.

Another common issue is gum inflammation caused by hormonal changes and increased blood flow. Gum disease during pregnancy may raise the risk of preterm birth and low birth weight, so caring for your oral health is essential to reduce complications.

Suggestions for week 18

Share the journey with your partner

Pregnancy is an experience for both parents, not just the mother. Invite your partner to be actively involved, whether it’s attending prenatal check-ups together, shopping for baby items, or discussing baby names. This helps strengthen his bond with the baby and reduces feelings of being left out.

Take care of your oral health

Dental care may not feel like a priority right now, but it’s crucial during pregnancy. Don’t skip regular dental check-ups and cleanings, as they help prevent gum disease and protect your baby’s healthy development.

Adjust your work environment

If you’re still working, consider discussing adjustments with your employer—such as more frequent breaks, avoiding night shifts, or reducing physically demanding tasks. These changes will help you stay comfortable while supporting a safe and healthy pregnancy for both you and your baby.

Reference

This article includes information adapted from the Dutch pregnancy care platform Zwangerportaal.