24 weeks pregnant baby size
By Pregora Editorial Team · Updated 2026-05-07 · 3 min read

At 24 weeks pregnant, your baby is about 30 cm / 11.8 in long and weighs around 600 g / 21 oz — comparable in size to a corn cob. About the length of a corn cob — and reaching the 'viability' milestone.
Length
30 cm / 11.8 in
Weight
600 g / 21 oz
Size of
Corn cob
Week 24 milestones
- Lungs are developing surfactant (critical for breathing after birth)
- Baby is now considered 'viable' — could survive with intensive NICU care
- Taste buds are forming — baby tastes amniotic fluid flavours
- Sleep cycles are establishing (baby has wake/sleep patterns)
Tip for week 24
Glucose tolerance test (gestational diabetes screening) typically happens between weeks 24-28.
Related calculators & pages
Disclaimer: Baby measurements are population averages — individual babies vary. Always consult your healthcare provider for personalised growth assessments based on your ultrasound scans.
Related tools
Due Date Calculator
Estimate your pregnancy due date from last period, conception, ultrasound, or a known due date.
Pregnancy Week Calculator
How far along am I? Find your current week, trimester, and major pregnancy milestones.
Ovulation Calculator
Find your fertile window, peak ovulation day, and next 6 ovulation dates from your last period.
Conception Calculator
Find when you most likely conceived from your last period, due date, or ultrasound.
Reverse Due Date Calculator
Already have a due date? Work backward to find conception date, LMP, and pregnancy timeline.
IVF Due Date Calculator
Calculate due date from embryo transfer — Day 3, Day 5, Day 6 transfers and FET cycles.
FET Due Date Calculator
Frozen embryo transfer due date — Day 3, Day 5, Day 6 FET cycles using fertility-clinic math.
Trimester Calculator
What trimester am I in? Find your current trimester (1st, 2nd, or 3rd) and trimester boundaries.
Implantation Calculator
When does implantation happen? Find your implantation window (6-12 days after conception) and earliest test date.
Pregnancy Test Calculator
When can I take a pregnancy test? Earliest reliable date for standard, early-detection, and blood tests.
Chinese Gender Predictor
Predict baby gender using the traditional 24×12 lunar age chart. For entertainment only — not science.
Pregnancy Weight Gain Calculator
Healthy weight-gain range based on pre-pregnancy BMI and current week, using IOM guidelines.