Second Trimester

Week 23: Baby crosses the threshold of viability — can potentially survive outside womb.

Here's everything happening with your baby and your body this week.

Baby size at week 23: Grapefruit
Your baby is the size of a
Grapefruit
Length
11.4 in
Weight
500 g
Week
23 / 40
💡 Expert tip

Sleep on your side with a pregnancy pillow between your knees — it takes pressure off the vena cava and reduces back pain.

🌱 Baby's development this week

Science fact

The viability threshold — when a baby can survive outside the womb — has shifted from 28 weeks (1960s) to 22–23 weeks today, thanks to NICU advances. Survival rates at 23 weeks are now 30–50%.

🤰 Your symptoms this week

Shortness of breath when active
uterus pressing up on diaphragm
Normal as uterus grows. Sleep propped up, avoid lying flat. Sudden severe breathlessness: seek care.
Difficulty sleeping comfortably
pregnancy pillow between knees and under bump helps
Heartburn after meals
eat smaller portions and avoid spicy, fatty foods
Eat smaller meals, avoid lying down after eating, skip spicy/fatty foods. Antacids (Tums) are safe.

💛 Changes in your body

💙 Mental health this week

The viability milestone can paradoxically increase anxiety for some women. If intrusive thoughts about baby

🥗 Nutrition focus

📅 Appointment / test

Glucose tolerance test (gestational diabetes screening) is coming at 24–28 weeks — prepare by eating normally beforehand.

✅ This week's checklist

Buy a quality pregnancy pillow if you haven
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