13th week of pregnancy – Everything about your baby, your body, and tips for you

Welcome to the 13th week of pregnancy and thus to the second trimester. For many expectant mothers, this is the time when they can truly begin to enjoy their pregnancy. Your baby is becoming more and more active, and your body is also preparing intensively for the months ahead. Now is a good moment to recharge your energy and to experience the changes with joyful anticipation.

Your belly is getting bigger week by week. People around you will probably soon notice that you are pregnant. Your pregnancy symptoms are likely to gradually subside in the 13th week and you will feel fitter.

Week 13 of pregnancy at a glance

Your baby:

At the 13th week of pregnancy, your child is about 6–7 cm in size and weighs around 20 grams.
The facial features are becoming increasingly delicate, and the forehead is continuing to form.
The hands and feet are fully developed, and the baby can grasp, albeit uncontrollably.
The circulatory system is active, and the placenta has fully taken over the supply.

Your body:

Many pregnant women feel more energetic from the 13th week of pregnancy onwards, as hormonal fluctuations subside.
The uterus continues to grow and is starting to make the belly visible.
As a mother, your appetite may increase – you now need more nutrients for yourself and your child.
The skin may appear rosier due to the increased blood circulation.

Interesting facts about foetus and mum:

The baby’s organs are fully formed and are beginning to work more effectively.
The head is still relatively large in the 13th week of pregnancy, but the proportions are slowly evening out.
Ensure a balanced diet with vitamin C and iron to support your blood circulation and help your baby build its body structures.
Continue to avoid certain foods such as raw milk products and ready-made salads to minimise the risk of infection.

Baby’s development in the 13th week of pregnancy:

Your little bundle of joy is around 20 grams in weight and 6 to 7 cm in size at the 13th week of pregnancy. It is gradually taking on more human features and its face is slowly becoming recognisable. You can’t quite see it clearly yet, but perhaps the baby already bears a slight resemblance to you.

But much more is happening in the development of your little one during week 13 of pregnancy. Their pancreas is now producing insulin. The development of the intestines (and other organs) is also progressing further. The amniotic fluid that the baby swallows can now, for the first time, be excreted in the form of stool.

Between the 12th and 14th week of pregnancy, your baby's organ of balance in the inner ear also begins to respond to movement. When you go for a walk or dance, your movements ensure that stimuli from the inner ear activate the areas in the brain responsible for well-being and calmness.

Your body in week 13 of pregnancy:

Your bump is now growing visibly faster week by week. Your sense of smell and taste may also have changed. Have your pregnancy symptoms already eased? Some expectant mums find the second trimester the most pleasant.

Many mums wait until the 12th week of their pregnancy is over before telling friends, family, and even their employer that they are expecting a baby. By the way, you are not obliged to inform your employer about your pregnancy at work. You are only required to announce your parental leave two months before it is due to start. However, it does make sense to inform your employer as early as possible about your pregnancy. This is because the Maternity Protection Act then comes into effect. Maternity protection brings you and your little one several advantages, such as protection against dismissal, protection periods before and after the expected due date, special provisions like breaks at work, and the right to attend medical appointments during working hours.

Tips for the 13th week of pregnancy

💡Not feeling like wearing maternity clothes yet? Then get creative. For example, bridge the gap between the button and buttonhole of your trousers with an elastic band.

Sport and exercise:

The 13th week of pregnancy is a good time to start moderate exercise such as swimming, yoga, or walking. These activities strengthen your muscles and promote your circulation, which can help relieve discomforts such as back pain or abdominal pressure. Gentle exercises also help to improve your posture and prepare you for the later months of pregnancy. Remember to always listen to your body and take breaks to avoid any risk.

Time for you and your family:

Plan a small picnic, a walk with friends, or some cosy hours with your partner. Such moments strengthen your bond and allow you to share the joy of your soon-to-arrive family member. You can also start making the first little preparations for the baby’s initial equipment in the 13th week of pregnancy – it’s fun and builds anticipation.

Preventive examination and consultations with the gynaecologist:

The next appointment with your doctor offers you the opportunity to check on your baby's progress. Your child’s size, weight, and blood circulation will be monitored. Use the appointment to ask any questions that are on your mind, whether about protective measures, nutrition, or any possible complaints. Your gynaecologist can also give you recommendations for healthy weight gain and support you with any specific concerns.

Consciously shaping your diet:

Your appetite may increase in the 13th week of pregnancy, as you need more energy and nutrients. Make sure to include foods rich in vitamins and iron in your diet. Fruit, vegetables, wholegrain products and lean proteins such as eggs are ideal for meeting your nutritional needs. Avoid raw milk products, ready-made salads, and raw meat or fish in order to prevent infections.

Self-care:

Treat yourself to regular short breaks to relax and recharge your batteries. A warm bath (not too hot) or a massage can relieve tension. Taking time for a hobby or reading a book can also help you to unwind and keep a clear head during this exciting time of your pregnancy. Self-care is especially important from week 13 onwards – after all, a little miracle is growing inside you and you are achieving something wonderful.

Frequently asked questions about week 13 of pregnancy

What is happening with my baby in the 13th week of pregnancy?

The baby continues to develop rapidly in the 13th week of pregnancy. It is busily practising swallowing amniotic fluid, which floats in the amniotic sac. The nervous system is becoming increasingly interconnected, and the baby is showing its first abilities, such as bending its legs. The liver and pancreas are starting to function, and the pancreas is beginning to produce insulin. During regular visits to the doctor, you can admire the progress on the ultrasound images.

Is it normal for nausea to decrease in the second trimester?

Yes, that is typical for this stage of pregnancy. The symptoms such as nausea and tiredness usually subside, and many expectant mothers feel more energetic again. Enjoy this relaxing time and prepare yourself for the most wonderful phase of pregnancy. If you are still bothered by smells, a combination of fresh air and snacks can help.

Can I still wear tight clothing?

Your favourite trousers might soon become too tight. It’s advisable to switch to maternity wear, which offers more room for your growing bump. Maternity clothes are not only comfortable, but also adapt to your figure during pregnancy without anything feeling restrictive.

What does the ultrasound show in the 13th week?

On the ultrasound image, you can see how the baby is growing and moving at this stage of pregnancy. Blood vessels and vocal cords are forming, while the baby is drinking more and more amniotic fluid. Organs such as the liver and intestines continue to develop, and you can make out the first details of the little profile. Talk to your doctor or midwife about the next check-up.

Why do I have to go to the toilet more often?

The growing uterus is pressing on your bladder. You are also producing more fluid, which is excreted in your urine. Continue to drink enough water during this week of pregnancy to keep your circulation functioning well and to ensure your baby is optimally provided for.

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