20 Weeks Pregnant
You’re 20 weeks pregnant — in the second trimester, and 20 weeks to go until your due date. Your baby is about the size of a banana this week.
★ Halfway point — the 20-week anatomy scan.
How big is your baby at 20 weeks?
Size of a
banana
Length
~25.6 cm
Weight
~300 g
Last week your baby was about the size of a mango; this week it's grown to roughly a banana.
Sizes are averages from standard fetal-growth references. Every baby grows at its own pace — your provider tracks yours at scans.
Baby development at week 20
Halfway there. Measurements now switch from crown-rump to the full head-to-heel length, which is why the figure jumps this week. The fetus is swallowing more, producing meconium (the first stool) in the bowels, and is active with regular sleep-wake cycles. The anatomy scan around now checks growth and organ development in detail. About as long as a banana.
Your body at 20 weeks
Common symptoms many people notice around week 20 include:
- Defined, regular baby movements
- A clearly visible bump
- Possible heartburn and indigestion
- Shortness of breath as the uterus rises
Symptoms vary enormously from person to person and pregnancy to pregnancy. Not having a symptom on this list is just as normal as having it.
Tips for week 20
- The 20-week anatomy scan is a key checkpoint — and often reveals sex if you want to know
- Eat smaller meals to reduce heartburn
- Celebrate the halfway mark
What trimester is 20 weeks?
Week 20 falls in the second trimester. As a quick map: the first trimester runs weeks 1–13, the second covers weeks 14–27, and the third is week 28 through birth (a due date is set at 40 weeks). Want your own dates? Our Pregnancy Due Date Calculator shows your due date and exactly how far along you are today.
The second trimester (weeks 14–27) is the stretch many people find most comfortable: early nausea usually fades, energy returns, and the bump becomes visible. The big checkpoint is the mid-pregnancy anatomy scan around week 20, and you'll likely feel the first movements during these weeks.
Frequently asked questions
- How many months is 20 weeks pregnant?
- 20 weeks pregnant is about 5 months. Pregnancy months don't divide evenly into 4-week blocks, so week-to-month conversions are approximate — most providers track pregnancy by week, not month.
- How big is the baby at 20 weeks?
- At 20 weeks, the baby is about the size of a banana, roughly 25.6 cm and around 300 g. These are averages — healthy babies vary, and your provider tracks your baby's own growth curve at scans.
- What trimester is 20 weeks?
- Week 20 is in the second trimester. The first trimester is weeks 1–13, the second is weeks 14–27, and the third is weeks 28 to birth (around week 40).