20 Weeks Pregnant

You’re in the second trimester and your baby is about the size of a banana. Here’s how your baby is developing, what you might feel, and the check-ups to plan this week.

Reviewed against ACOG & WHO guidance Updated 25 September 2026
Baby is about the size of
A banana (kela)
Length ~25.6 cm (head to heel)Weight ~300 gTrimester 2Month 5

Sizes are averages; from week 20 length is measured head to heel. Not sure which week you’re in? Calculate it.

Your baby at 20 weeks

You’re halfway there! From this week, length is measured from head to heel rather than head to bottom, which is why the number jumps. The baby swallows amniotic fluid, and meconium – the first stool – is building up in the intestines.

Your body at 20 weeks

The top of your uterus is around the level of your belly button. Movements are getting stronger, and heartburn may appear.

Common symptoms this week

  • Heartburn
  • Stronger movements
  • Shortness of breath

Tips & to-do list

  • Complete your anomaly scan if not done yet.
  • Eat smaller meals and avoid lying down straight after eating to reduce heartburn.
  • Check your haemoglobin is on track – anaemia is common in Indian pregnancies.

Check-ups and tests around this week

  • Quadruple marker test if first-trimester screening was missed (15–20 weeks)
  • Anomaly / Level-II / TIFFA scan (18–22 weeks)

Week 20 at a glance

At 20 weeks
TrimesterSecond trimester
Pregnancy monthMonth 5 of 9
Weeks to due date20 weeks
Days pregnant140–146 days
Progress50% of 40 weeks

When to call your doctor

Contact your doctor or go to hospital straight away if you notice:

  • Any vaginal bleeding or fluid leak
  • Regular tightenings or period-like cramps before 37 weeks
  • Severe headache, blurred vision or sudden swelling of face and hands
  • Fever, or pain while urinating

Questions about 20 weeks pregnant

How many months is 20 weeks pregnant?

20 weeks pregnant falls in month 5 of pregnancy, in the second trimester. For medical purposes, weeks and days are more precise than months.

How big is my baby at 20 weeks?

At 20 weeks your baby is about the size of a banana (kela) – roughly ~25.6 cm (head to heel) long and weighing about ~300 g.

Is it normal to have no symptoms at 20 weeks?

Yes. Every pregnancy is different, and symptoms come and go. Feeling well is not a sign that something is wrong. If you have concerns, or notice any warning signs listed on this page, contact your doctor.

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Medical disclaimer: The results and information on this page are estimates for general education only. They are not a diagnosis and do not replace advice from your gynaecologist, obstetrician or midwife. If you have pain, bleeding, reduced baby movements or feel unwell, contact your doctor or call 108 immediately. Read the full disclaimer.

Written by the Pregnancy Calculator editorial team. Based on published obstetric guidance (ACOG, WHO, MoHFW India, FOGSI). Last updated . How we create content.