Your baby at 13 weeks
The body grows and begins catching up with the head. The ovaries or testes are developing.
The baby continues moving. Development and growth vary between pregnancies.
TRIMESTER 1 · WEEK 13
13 weeks pregnant
A new chapter approaches.
What to expect at 13 weeks pregnant: your baby, your symptoms and this week’s reminders.
Symptoms at 13 weeks pregnant
- Some people begin to feel more energetic.
- Nausea may ease or continue.
- Mild stretching sensations may occur.
None of these symptoms is required. Symptoms alone cannot diagnose pregnancy or establish your baby’s wellbeing.
If discomfort is severe, persistent or accompanied by bleeding, seek assessment.
Source for this week: NHS — Week 13
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.