What is happening with your baby?
Weekly development notes and approximate length. Measurements are general examples rather than personal targets.
THE LUMAMOM PREGNANCY GUIDE
Pregnancy
week by week.
Find your pregnancy week to see how your baby is developing, which symptoms you might notice and what to expect next.
Find my week
YOUR WEEK, YOUR JOURNEY
How many weeks pregnant are you?
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
More than a calendar.
A little guide to understanding your body and your baby.
A conceptual illustration, not a depiction of an anatomical stage, actual size or individual development.AROUND THE HALFWAY POINT
A connection that begins
with a flutter.
First movements are often felt between 16 and 24 weeks. In a first pregnancy, you may notice them after 20 weeks. Get to know your baby’s individual movement pattern.
Explore week 20 ↗Tell your pregnancy-care team if you have felt no movements by 24 weeks.
HOW TO USE THIS GUIDE
What might change for you?
Symptoms you might notice. You do not have to experience them all; everyone is different.
What to focus on this week
Short reminders for everyday life and appointments. Your own clinician’s plan takes priority.
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.