Week 23 of 40 Second Trimester

Week 23: Baby's Hearing Is Sharpening

Your baby can now hear sounds from outside the womb more clearly, including your voice, and may startle in response to loud noises.

Baby is the size of
Large Mango
28.9 cm
501 g
58% through your pregnancy
Week 22 All Weeks Week 24
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Baby's Development

Your baby's hearing has developed enough to pick up sounds from the outside world, including your voice, which they may already be recognizing the rhythm and tone of. Loud or sudden noises can cause a startle response.

Your baby's skin is still thin and somewhat translucent, but blood vessels underneath give it a reddish appearance at this stage — this will change as fat accumulates under the skin in the coming weeks and months.

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Changes in Your Body

Your uterus continues its steady rise, and your belly button may even start to flatten or pop outward for some women as the uterus pushes against the abdominal wall from the inside.

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Common Symptoms

At 23 weeks, common experiences include:

  • Strong, regular movement, including responses to sound
  • Braxton Hicks contractions, occasionally
  • Continued backaches
  • Swelling
  • Stretch marks
  • Difficulty sleeping comfortably as the bump grows
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Nutrition This Week

Continue eating regularly throughout the day to maintain stable energy and blood sugar, which also supports your baby's continued steady growth. This is also a good time to discuss your glucose screening test, usually done around 24-28 weeks.

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Safe Exercises

Side-sleeping with a pregnancy pillow for support between the knees can improve comfort if sleep is becoming harder. During the day, continue with whatever moderate exercise routine has been working for you.

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Medical Checklist

This week:

  • Ask your doctor about scheduling your glucose screening test for gestational diabetes
  • Consider a pregnancy pillow if sleep comfort is declining
  • Continue monitoring fetal movement patterns
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Doctor Visit Guide

The glucose screening test (often called the glucose tolerance test) is typically performed between 24 and 28 weeks and checks for gestational diabetes. Your doctor will explain the specific process used at your clinic.

Frequently Asked Questions

Research suggests babies can begin recognizing the rhythm and pitch patterns of their mother's voice in the womb, and many studies show newborns showing a preference for their mother's voice immediately after birth, supporting that this recognition begins prenatally.

It usually involves drinking a sugary solution and having your blood sugar tested afterward, sometimes with multiple blood draws over a couple of hours depending on the specific test used at your clinic. It checks how your body processes sugar during pregnancy.

As your uterus grows and pushes against your abdominal wall, your belly button can flatten out or even pop outward temporarily. This is a normal, common change and typically returns to its usual shape sometime after delivery.
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