Your baby at 5 weeks
The structures that will form the brain and spinal cord develop rapidly. The first outlines of the face begin to appear.
Blood vessels associated with the developing placenta and umbilical cord continue to form.
TRIMESTER 1 · WEEK 5
5 weeks pregnant
Building the foundations.
What to expect at 5 weeks pregnant: your baby, your symptoms and this week’s reminders.
Symptoms at 5 weeks pregnant
- Nausea and sensitivity to smells may occur.
- You may urinate more often or have tender breasts.
- You may feel less energetic.
None of these symptoms is required. Symptoms alone cannot diagnose pregnancy or establish your baby’s wellbeing.
Make room for fluids and rest. Discuss any medicine changes with your clinician.
Source for this week: NHS — Week 5
YOUR WEEK, YOUR JOURNEY
Explore another pregnancy week
Choose a week to explore your baby’s development and changes you may notice.
01 · FIRST TRIMESTERSmall beginnings
02 · SECOND TRIMESTERA growing connection
03 · THIRD TRIMESTERGetting closer to meeting
Sources and content note
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.
- NHS — Pregnancy week by week
- ACOG — Fetal development and gestational age
- NHS — Your baby’s movements
- NHS — Pregnancy symptoms
Sources checked: 31 October 2026 · Illustrations are AI-generated conceptual drawings, not ultrasound or diagnostic images.