First trimester · Month 3 of 9

Week 10: The fetal stage begins

Your blood volume and hormone levels are changing, which can influence headaches, dizziness and energy.

Month 3 · Week 1030 weeks to the due-date marker
Month3 of 9
Week10
PeriodFirst trimester
This monthFirst checks

In 60 seconds

Your short plan for this week

Do now

Write down your questions about dating and screening before the next visit: what is offered, when, what it can show and what happens after a result.

Coming up

Dating scans and first-trimester screening sit in defined windows, so confirm your dates with the doctor rather than waiting for a generic week online.

Pause and ask

Do not consent to a test only because it appears routine—ask what decision the result could help you make.

What you may notice

Your body and how you may feel

Your blood volume and hormone levels are changing, which can influence headaches, dizziness and energy.

What is happening

Baby’s development this week

The fetal stage begins around this period as organs continue their early development.

Plain-language examples

What this means in real life

Screening estimates chance; it is not the same as diagnosis. A higher-chance result usually opens a conversation about further options.

A short checklist

What to do now

  • Write down your questions about dating and screening before the next visit: what is offered, when, what it can show and what happens after a result.
  • 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 consent to a test only because it appears routine—ask what decision the result could help you make.
Check food, medicines, exercise and everyday activities →

What may be coming up

Appointments, tests and decisions

Dating scans and first-trimester screening sit in defined windows, so confirm your dates with the doctor rather than waiting for a generic week online.

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

  • Make a shared question list and learn the difference between screening and diagnostic testing without pushing a preferred choice.

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