TRIMESTER 2 · WEEK 20
What to expect at 20 weeks pregnant: your baby, your symptoms and this week’s reminders.
Vernix helps protect the skin. The baby makes kicking, turning and sucking movements.
From this week, this guide uses head-to-heel rather than head-to-bottom length. The change in the number reflects a different measurement method.
None of these symptoms is required. Symptoms alone cannot diagnose pregnancy or establish your baby’s wellbeing.
If you have not felt any movement by 24 weeks, tell your pregnancy-care team.
Source for this week: NHS — Week 20
Measurement note: early lengths are head-to-bottom; from week 20 they are head-to-heel. The numbers across that change should not be compared as if the measurement method were the same.
YOUR WEEK, YOUR JOURNEY
Choose a week to explore your baby’s development and changes you may notice.
This is source-based general information, not a substitute for a clinical assessment or individual care plan. The presence, absence or change of symptoms alone cannot establish pregnancy wellbeing. This content is not a personalised care plan reviewed by a healthcare professional.
This guide groups weeks 1–13 in the first trimester, 14–27 in the second, and 28 onwards in the third. Weeks refer to gestational age dated from the last menstrual period; clinical dating may differ.
Sources checked: 31 October 2026 · Illustrations are AI-generated conceptual drawings, not ultrasound or diagnostic images.