13 Weeks Pregnant

How is Your Baby Growing at 13 Weeks?

As you enter the second trimester of pregnancy, your baby forms lots of tiny hairs over the surface of their body. Their sense of taste and smell begin to form.

The ears are now fully developed, including the inner ears. This means that your baby will be able to recognise your voice from this stage, so now is a great time to start talking to them!

Your baby’s bone marrow is forming and creating white blood cells that will contribute to their immune system. The placenta is now fully formed and is supplying your baby with the oxygen and nutrients it needs to grow.

The genitals have now fully formed, but you will not yet be able to determine the sex of your baby through ultrasound. If the foetus is a girl, she will already have produced two million eggs that reside in her newly-formed ovaries.

How Big is Your Baby at 13 Weeks?

At 13 weeks, your baby is 7 cm (about the size of a satsuma) and weighs 25 g.

What Happens at 13 Weeks?

At week 13, you’re in the second trimester of pregnancy and the risk of having a miscarriage decreases significantly. Your pregnancy belly will become more prominent from this point onwards.

What Symptoms Will You Have at 13 Weeks?

During week 13, your morning sickness and lethargy may have subsided.

You might feel much more energetic than you have done in the past three months. Your sex drive might increase due to the changes in hormones and the increased blood flow to the pelvis.