Week 20 Size: Banana
About the length of a banana (measured head-to-toe).
Relative Visual Scale
Solid circle represents your baby's size. Dotted circle shows the full-term week 40 size threshold.
Burt's Bees Mama Bee Belly Butter
An extra-rich, fragrance-free cocoa butter cream formulated to keep stretching skin soft, hydrated, and elastic.
FTC Disclosure: As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.Baby's Development
You are halfway there! Fetal measurements now switch from crown-to-rump to crown-to-heel. The baby is swallowing more amniotic fluid, which helps train their digestive system. A dark, tarry substance called meconium is building up in their bowels.
Weekly Milestones
- ✦ Halfway Milestone (20 Weeks)
- ✦ Anatomy Ultrasound
- ✦ Meconium Begins Forming
Your Body & Symptoms
Your belly button may pop out and become an 'outie.' You are likely having your mid-pregnancy anatomy scan, which is an exciting chance to see the baby's organs, limbs, and potentially find out the gender.
Common Symptoms this Week
Doctor & Care Recommendations
- ✓ Prepare for your anatomy ultrasound scan.
- ✓ Hydrate well and moisturize your stretching belly.
- ✓ Start looking into childbirth education classes.
PregWeeks
CHECKLISTUltimate Hospital Bag & Birth Plan
Print-Ready PDFThe Ultimate Hospital Bag Checklist & Birth Plan PDF
Prepare for labor with confidence. Our doctor-reviewed checklists ensure you don't forget any newborn or partner essentials in the hospital delivery room.
- ✓ Clinical OB-GYN Approved List: Separate checklists detailing exactly what mom, partner, and newborn baby require for a standard 3-day recovery stay.
- ✓ 10-Second Birth Preference Builder: Minimalist visual plan templates designed to help delivery nurses digest your labor choices instantly on check-in.
- ✓ 1-Click Offline Access: High-resolution, print-ready document formatted to download directly to your mobile device for offline reference in the clinic.
Weekly Health Guides & Resources
Second Trimester Guide
Read comprehensive clinical milestones, screening checklists, and developmental guidelines for this phase.
Track & Relieve Symptoms
Learn why symptoms occur, home remedies, and clinical indicators for this week:
Food Safety Checklists
Verify safety statuses, listeria and mercury risks, and safe alternatives for:
Frequently Asked Questions: Week 20
Evidence-Based Clinical Sources for Week 20
PregWeeks is dedicated to medical transparency. Every milestone, symptom tip, and fetal development guideline for Week 20 is sourced directly from clinical guidelines published by leading obstetric authorities. Read more about our editorial methodology on our Medical Sources page.
Prenatal Diagnostic Testing for Genetic Disorders (Practice Bulletin No. 162)
ACOGClinical recommendations for mid-pregnancy screening options, including the anatomy ultrasound scan commonly scheduled between weeks 18 and 22.
View Clinical Guideline ↗Gestational Diabetes Mellitus (Practice Bulletin No. 190)
ACOGPractice standards for screening and diagnosing gestational diabetes mellitus (GDM), typically scheduled between weeks 24 and 28.
View Clinical Guideline ↗Implementing a Gestational Diabetes Screening Protocol (Committee Opinion No. 798)
ACOGStandardized protocols for glucose screening tests to detect gestational diabetes and optimize maternal-fetal metabolic health.
View Clinical Guideline ↗Get weekly pregnancy updates
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