Pregnancy Week 20

At 20 weeks pregnant, you are around halfway through pregnancy. Your baby is growing steadily, moving more strongly, and developing some of the protective features they will need after birth.

A special type of fat called brown fat is starting to form. Newborn babies use brown fat to help keep warm, especially in the early days after birth when they are adjusting to life outside the womb.

Your baby’s skin is also beginning to develop more protection. Fine hair is continuing to develop, and a creamy coating called vernix caseosa is becoming more noticeable on the skin. Vernix helps protect your baby’s skin while they are surrounded by amniotic fluid. 

Your baby’s skeleton is strengthening too, as soft cartilage continues hardening into bone. This helps movements become stronger and more coordinated. If you have not felt movement yet, you may notice it soon. If you have, those little flutters may start becoming easier to recognise.

Your baby also has sleep and wake periods now. They may settle into favourite positions in the womb, although not necessarily at times that suit your diary.

At 20 weeks pregnant, your bump may be becoming more obvious, although size varies a lot from person to person. You may also be noticing movements more clearly now, often as flutters, bubbles, taps or little nudges.

A pale line running from your pubic bone towards your belly button may darken during pregnancy. Before it darkens it is sometimes called the linea alba, and once pigmented it is known as the linea nigra. It is caused by normal pregnancy-related pigmentation changes and usually fades after birth. 

Other pigmentation changes may also become more noticeable, including darker nipples, freckles, moles or patches of skin on the face. Daily sunscreen is sensible if you are prone to facial pigmentation, as sun exposure can make it darker.

You may also notice:

Your body is doing a lot more work now, so comfort matters. Supportive shoes, better sitting posture, regular movement breaks and clothes that do not dig in are not luxuries. They are basic pregnancy engineering.

Week 20 can feel like a proper milestone. You may have your mid-pregnancy scan around this stage, your bump may be more visible, and baby movements may be making the pregnancy feel more real.

That can be wonderful. It can also be a moment where the scale of it all lands. Halfway sounds reassuring until you realise the second half includes quite a few decisions.

Use this stage to get clearer, not busier. You do not need to solve everything this week. But it is worth starting to separate decisions into:

If movement is starting, it can also strengthen your bond with your baby. Those small nudges can make the baby feel less theoretical and more like someone you are beginning to know.

If your mid-pregnancy scan is coming up, check the appointment details and write down any questions. This scan usually looks closely at your baby’s development and may also be the point where you can find out the baby’s sex, if you want to and if the sonographer can see clearly.

This week, focus on practical halfway-point steps:

Movements are still developing, so they may not be regular yet. Later in pregnancy, your midwife will talk to you about getting to know your baby’s usual pattern. For now, simply notice what you feel and mention any worries.