23 Weeks Pregnant: Pregnancy Symptoms & Baby Development

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Explore pregnancy stages week by week

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See how your baby is developing at 23 weeks pregnant. Learn about changes to your body, your baby and important nutrients for week 23 of pregnancy




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23 weeks pregnant is how many months?

Month 6 (Trimester 2)


Baby development at 23 weeks

Your baby is filling out now, even if your belly may not be.


Pregnancy at 23 weeks

Watch out for kung-fu moves from your little one.



Make sure you’re getting enough of this natural inner armour.

What does my baby look like? What size is my baby?

In week 22 of pregnancy, your baby will measure roughly 20cm from head to bottom (roughly the size of a coconut) and weigh around 450g.

Your voice is the clearest thing he or she will hear during pregnancy1. Soon, your baby will start responding with sophisticated orienting movements1. Your baby is also beginning to make out other sounds, rhythms and melodies2,3. This is a good time to start talking to and, if feel like it, singing to your baby. Studies have shown that, just hours after birth, babies show a preference for their mother’s voice1.

The other sense that’s developing is taste4. Your diet can influence what your baby will eat when born, so it’s best to avoid passing on a taste for junk food. Tuck into plenty of fresh veg that’s rich in vitamin C.

Baby development at 23 weeks Baby development at 23 weeks

Your baby’s well ahead of the game and already producing their adult teeth. They line up behind their milk teeth, although teething doesn’t usually start until they’re about six months old.1

Pregnancy at 23 weeks (second trimester) What’s happening in my body?

Now you’re over the half-way mark of your pregnancy, you’ll notice your baby really starting to grow. You may start experiencing some pain as your rib cage expands to accommodate your growing child. You’ll feel it even more so if your little one decides to practice some kung-fu, and jabs you with a wayward foot.

Being active and exercising can help you stay comfortable, and it’s especially good for back pain, which is common in pregnancy. The HSE recommends prenatal yoga or aquanatal classes (gentle exercise classes in water) with a qualified instructor3. These can help build your muscles to better support your back.

You could also experience breathlessness as your baby grows. Your womb continues to push up, and will eventually impact the diaphragm, which is the muscle that sits under your ribcage and which controls your breathing. In turn, this also presses on your lungs4.

You can help ease the feeling by standing upright (this also helps ease backache from carrying another person), or taking the weight off your feet completely and relaxing with a book or a movie.

Pregnancy symptoms in week 23

With more blood around your pelvic area, your body creates a milky fluid called leucorrhoea to keep your vagina clean and free from infection. If you notice it start to smell strongly, change colour or texture, then you may have an infection and should see your midwife5.

These digestive problems are caused by your baby growing into some of the space your stomach occupies, and your changing hormones6.

Those hormones are the likely culprits. Paracetamol is usually safe to take during pregnancy, but always at the lowest effective dose, and for the shortest possible time7.

With your body pumping more blood, and rampaging hormones, you can feel extremely hot. And not always in the best sense of the word. Wear loose, breathable fabrics and stay hydrated with chilled water8.

Braxton-Hicks contractions, also known as ‘false labour pains’ happen when the womb contracts and relaxes. It’s your body’s way of ‘rehearsing’ for birth and not something to worry about. Some women don’t even notice them9.

You’ll need extra iron for your baby. Signs of iron deficiency include feeling tired, and looking pale8. Talk to your midwife about taking an iron supplement.

Focus on Calcium

Calcium is an important mineral, and should form a key part of your diet. Adult women need 700mg of calcium each day, whether pregnant or not10 - a reduction from the 1000mg recommended for adolescent females between 11-18 years old11. According to one study, an adequate intake of calcium in pregnancy may also help to reduce the risk of pre-eclampsia and preterm birth12. Thankfully, calcium is found in plenty of foods, including:

  • Calcium-fortified breakfast cereals
  • Dairy products, including pasteurised milk, yogurt and hard cheese, like cheddar (not soft blue cheese, or soft cheese with a white rind)
  • Fish with edible bones (like sardines)
  • Nuts and seeds, especially almonds and sesame seeds
  • Figs or dried apricots
  • Green vegetables like curly kale or spinach
  • Tofu
  • Calcium-fortified milk alternatives, such as certain oat milks

The body can’t make calcium, so it can only be sourced through diet. If you’re not getting enough calcium each day from your diet, your body will use its own stores of calcium, which could affect your bone health.

The science behind Calcium, Powered by Nutricia

Ask anyone what calcium’s good for and you’ll hear ‘teeth and bones’. After all, that’s how 99% of calcium is used in the human body1. However, you shouldn’t discount the remaining 1%. This tiny amount gets just about everywhere: Almost every cell in our body uses calcium in some way13, and as your pregnancy develops, your body’s ability to absorb calcium increases14.

This marvellous micro-mineral is also responsible for important functions like muscle contraction (including the heart), neurotransmitter secretion, digestion and blood clotting. Calcium also supports structures other than the skeleton, including membranes15.

If you happen to be on thyroid hormone replacement medication while pregnant, tell your doctor or midwife immediately. Calcium and iron supplements can interfere with the absorption of your thyroid supplement16.

Your baby's future health begins here

At Aptaclub, we believe that experience helps to build resilience; and that each new encounter, whether in pregnancy or after birth, can shape your baby’s future development. With our scientific expertise and one-to-one round the clock support, we can help you and your baby embrace tomorrow.

mom and baby

Get in touch with our Careline experts

Our nutritionists and feeding advisors are always on hand to talk about feeding your baby. So if you have a question, just get in touch

  1. Murkoff H, Mazel S. What to Expect When You’re Expecting. 4th ed. London: Simon & Schuster Ltd, 2009. p. 261.
  2. Deans A. Your New Pregnancy Bible, The experts’ guide to pregnancy and early parenthood. 4th ed. London: Carroll & Brown Publishers Limited, 2013. p. 41.
  3. NHS UK. Back pain in pregnancy. [Online] Available at: https://www.nhs.uk/conditions/pregnancy-and-baby/backache-pregnant/ Page last reviewed: 14 February 2018. Next review due: 14 February 2021.
  4. Babycentre. Breathlessness in pregnancy. [Online] Available at: https://www.babycentre.co.uk/a219/breathlessness-in-pregnancy Last reviewed: November 2017
  5. NHS UK. Vaginal discharge in pregnancy. [Online] Available at: https://www.nhs.uk/conditions/pregnancy-and-baby/vaginal-discharge-pregnant/ Page last reviewed: February 2018. Next review due: February 2021
  6. NHS UK. Start4life. Week 25 - your second trimester. [Online] Available at: https://www.nhs.uk/start4life/pregnancy/week-by-week/2nd-trimester/week-25/ [Accessed December 2019]
  7. NHS UK. Can I take paracetamol when I’m pregnant? [Online] Available at: https://www.nhs.uk/common-health-questions/pregnancy/can-i-take-paracetamol-when-i-am-pregnant/ Page last reviewed: 1 June 2018. Next review due: 1 June 2021.
  8. Tommy’s. 10 common pregnancy complaints. [Online] Available at: https://www.tommys.org/pregnancy-information/im-pregnant/early-pregnancy/10-common-pregnancy-complaints Page last reviewed: April 2018. Next review due: April 2021
  9. Tommy’s UK. Braxton Hicks. [Online] Available at: https://www.tommys.org/pregnancy-information/labour-birth/braxton-hicks Page last reviewed: July 2019. Next review due July 2022.
  10. Department of Health. Report on Health and Social Subjects 41. Dietary Reference Values for Food Energy and Nutrients for the United Kingdom. London: TSO, 1991.
  11. British Nutrition Foundation. Calcium Counts. [Online] Available at: https://www.nutrition.org.uk/attachments/article/874/Calcium%20counts_final_20.08.18.pdf Page last reviewed: August 2018. Next review due: August 2021.
  12. Hofmeyr GJ et al. Calcium supplementation during pregnancy for preventing blood pressure disorders and related problems. Cochrane Database Syst Rev, 2018, Issue 10
  13. University of Wisconsin School of Medicine and Public Health. Why is Calcium important. [Online] Available at: https://www.medicine.wisc.edu/rheumatology/why-calcium-important [Accessed December 2019]
  14. Kumar A, Kaur S. Calcium: A Nutrient in Pregnancy. J Obstet Gynecol India 2017;67:313–318
  15. National Institute of Haematology and Blood Transfusion, 1113 Budapest, Hungary. G.Gárdos. The role of calcium in red cell membrane transport processes introduction. [Online] Available at: https://www.sciencedirect.com/science/article/pii/B9780080268187500245 [Accessed December 2019]
  16. The Mayo Clinic. Can calcium supplements interfere with hypothyroidism treatment? Todd B. Nippoldt, M.D. [Online] Available at: https://www.mayoclinic.org/diseases-conditions/hypothyroidism/expert-answers/hypothyroidism/faq-20058536 [Accessed December 2019]

Last reviewed: 14th January 2020
Reviewed by Nutricia’s Medical and Scientific Affairs Team

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