Week 13
First TrimesterFirst Trimester Complete
The first trimester is over. Baby has all its essential organs and systems. The weeks ahead bring more growth and your first chance to feel movement.
End of First Trimester
This week's tip
💡 Take a moment to acknowledge what you've just been through — the first trimester is genuinely hard, and you did it. Celebrate yourself today.
Baby this week
🍋
About the size of
a lemon
Length
7.4 cm
Weight
23 g
Development
- All essential organs are formed and growing.
- Baby's vocal cords are beginning to develop.
- Fingerprints are forming — already unique.
- Baby can kick, though you won't feel it yet.
- The intestines are moving from the umbilical cord into the belly.
How you might feel
- For many, the second trimester brings a welcome wave of energy.
- Nausea may be significantly reduced.
- You may begin showing more noticeably.
- Increased sex drive returns for some women.
Things to do this week
- Schedule your anatomy scan (typically weeks 18–20)
- Begin researching childbirth education and parenting classes
- Look into maternity leave options and workplace rights
- Enjoy the return of energy — move, get out, do things you love
When to contact your care team
This is general guidance, not medical advice.
- Contact your care team if you continue experiencing severe nausea beyond this point — it may need treatment.
Partner tip
Celebrate reaching the end of the first trimester. It's a milestone. Acknowledge how hard these weeks may have been.