First trimester · Month 3 of 9

Week 13: The first trimester is closing

The uterus is rising and clothes may feel different, while emotions may still be unpredictable.

Month 3 · Week 1327 weeks to the due-date marker
Month3 of 9
Week13
PeriodFirst trimester
This monthFirst checks

In 60 seconds

Your short plan for this week

Do now

Bring persistent symptoms into the next visit—constipation, reflux, headaches, anxiety and pelvic pain all count even when they seem 'minor.'

Coming up

Ask what the second-trimester plan includes and when your mid-pregnancy anatomy assessment will be arranged.

Pause and ask

Do not start herbal remedies for lingering symptoms without a pregnancy-specific medicine check.

What you may notice

Your body and how you may feel

The uterus is rising and clothes may feel different, while emotions may still be unpredictable.

What is happening

Baby’s development this week

Growth becomes the main story as the first trimester draws to a close.

Plain-language examples

What this means in real life

The trimester boundary is a useful label, not a switch: nausea and fatigue do not have to disappear at week 13.

A short checklist

What to do now

  • Bring persistent symptoms into the next visit—constipation, reflux, headaches, anxiety and pelvic pain all count even when they seem 'minor.'
  • Review medicines and supplements with a clinician or pharmacist.
  • Choose food-safety and substance-free habits without chasing perfection.

Pause and check

What not to do—or what to ask first

  • Do not start herbal remedies for lingering symptoms without a pregnancy-specific medicine check.
Check food, medicines, exercise and everyday activities →

What may be coming up

Appointments, tests and decisions

Ask what the second-trimester plan includes and when your mid-pregnancy anatomy assessment will be arranged.

Common planning window

Dating and first-trimester assessment

Your care team may offer ultrasound and screening within a defined pregnancy window.

Common planning window

Early pregnancy assessment

Confirm your history, care pathway and the early tests your doctor recommends.

Common planning window

Understand screening choices

Ask what each screening test can and cannot tell you before deciding.

For the support person

One useful thing a partner can do

  • Ask which symptom is taking the most energy and remove one practical burden from the coming week.

Contact your care team

Contact your doctor or maternity team promptly

Some concerns need advice before the next routine appointment even when they do not feel like an emergency. If a symptom becomes severe, sudden or frightening, use urgent care instead.

See when to contact care

Urgent or emergency

Urgent signs during pregnancy or within a year after birth

Get medical care immediately for these symptoms. The list is not exhaustive; if something feels seriously wrong, seek help.

Open urgent warning signs