Pregnancy Countdown — 20 Weeks Left Until Due Date
You have 20 weeks left until your estimated due date (EDD). That means you are currently around week 20 of pregnancy. Below is a countdown-focused plan — what to prepare, what to pack and which milestones you should hit this week.
Pregnancy Countdown Calculator
Enter the first day of your last menstrual period (LMP). EDD = LMP + 280 days.
How to Use This Calculator
1. Enter the LMP date
Use the labelled fields and units that match your situation.
2. Calculate instantly
The result, visual comparison, and working update as values change.
3. Discuss the estimate with your clinician
Check assumptions, then copy, print, or share the calculation.
Practical Examples & Use Cases
| Starting date | Method | Calculation | Planning use |
|---|---|---|---|
| 1 Jan | LMP | +280 days | Estimated due date |
| Known clinical date | Ultrasound | Clinician dating | Confirm or revise estimate |
Baby at week 20
With 20 weeks left, your baby has already: Halfway point. Fetus swallows amniotic fluid — practices digestion. Sex confirmed on anatomy scan.
Mother's body — what changes
With 20 weeks to go, your body is: Fundus reaches the navel. Weight gain 4–6 kg by now is expected in singleton pregnancy.
Nutrition & supplements
Add ~340 kcal/day above pre-pregnancy baseline. Prioritise iron (27 mg/day), calcium (1000 mg), omega-3 DHA (200–300 mg) and 71 g protein. Continue prenatal vitamin. With only 20 weeks left, focus on iron-rich foods to build baby's stores for the first 6 months of life, and vitamin K-rich leafy greens.
Safe exercise
Continue 150 min/week. Avoid supine (flat-on-back) exercises after week 20 — they compress the vena cava. Swimming and prenatal Pilates are ideal now. With 20 weeks left, prioritise perineal massage, pelvic tilts and squats — active preparation for the pushing stage.
Doctor visit checklist — week 20
- ✓Anatomy scan completed — save images and report
- ✓Weekly antenatal visit from week 36
- ✓Group B Strep swab at 35–37 weeks
- ✓Discuss induction/C-section timing at 39–40 weeks
Warning signs — call your provider immediately
- ⚠Heavy bleeding (soaking a pad in an hour)
- ⚠Severe abdominal pain that does not ease
- ⚠Fever above 38°C / 100.4°F
- ⚠Sudden gush of fluid (early rupture of membranes)
- ⚠Absent fetal movement for 12+ hours after 24 weeks
- ⚠Severe headache + visual disturbance (preeclampsia)
Week 20 — Frequently asked questions
Content aligned with NHS antenatal guidance and ACOG term-delivery. Reviewed by Dr. Maria Rehman, MD (OB/GYN). This page is educational and does not replace personal medical advice — call your obstetrician for any concern.
Related Calculators & Tools
Pregnancy Calculator
Week 20 guidance and calculation for this pregnancy timeline.
IVF Pregnancy Calculator
Week 20 guidance and calculation for this pregnancy timeline.
Twin Pregnancy Calculator
Week 20 guidance and calculation for this pregnancy timeline.
Conception Calculator
Week 20 guidance and calculation for this pregnancy timeline.
Pregnancy Countdown Calculator — Week 19
Review the previous week in this pregnancy timeline.
Pregnancy Countdown Calculator — Week 21
Continue to the next week in this pregnancy timeline.