Overview
Baby is putting on weight and the lungs are developing. The baby is growing more resilient week by week now, and that can make this stage feel especially precious and real.
Second Trimester · Weeks 14–27
Week 23 Pregnancy
Baby is putting on weight and the lungs are developing.
About the size of a grapefruit3 min read10 sections
On this page
Baby Development
The lungs are developing important air sacs, though they still have a long way to go, and the skin is gradually becoming less translucent. The baby is gaining weight more steadily and moving with stronger purpose.
Baby Size
A playful size comparison for this week is grapefruit. That grapefruit-sized baby is putting on more substance now, not just length.
Mother's Body Changes
You may notice more pressure under the ribs or through the pelvis depending on how the baby is positioned. Braxton Hicks can start appearing more clearly, especially after activity or dehydration.
Common Symptoms
Week 23 may bring stronger kicks, swelling in the feet, heartburn, backache, Braxton Hicks tightenings, and interrupted sleep. Some parents also notice leaking colostrum beginning this early.
Nutrition Tips
Iron becomes even more important as blood volume expands, so include sources regularly and follow any supplement advice closely. If reflux is building, smaller meals and not lying down straight after eating can make a real difference.
Exercise & Movement
Choose movement that supports circulation and sleep, like a comfortable walk, swimming, or a short stretching session in the evening. If Braxton Hicks start during activity, pause, hydrate, and check whether they settle.
Emotional Wellbeing
The growing sense of connection can make future planning feel urgent or emotional. Try to hold space for both excitement and fear without demanding certainty from yourself.
Partner Support
Partners can help by taking sleep disruption seriously and by adjusting plans when your energy changes. Flexibility is a form of love in pregnancy.
Warning Signs
Urgent warning signs this week include heavy bleeding, severe abdominal pain, fever, fainting, leaking fluid, or a severe headache with vision changes. Contact your doctor for painful regular tightenings, fluid leakage, bleeding, or a noticeable change in how the baby has been moving for you.
Frequently Asked Questions
They often feel like the uterus tightening or hardening for a short time. They are usually irregular and less intense than labour contractions.
ParentVibes Tip
Stay active in ways that feel good and safe for you. If nights are getting choppy, a small pre-bed snack and a pillow plan can help more than you expect.
Continue your journey
Explore the full second trimester guide.
ParentVibes offers general information, not medical advice. Always follow your doctor or midwife.