Numbers & values · women's health · pregnancy decisions

NIPT vs the 12-week screening: what the numbers actually mean for you.

You'll hear NIPT is "99% accurate". Pop your age in and see what a "higher-chance" result would really mean for you — and what each test does and doesn't check. This doesn't tell you which test to have. It just makes the numbers clear so you can decide. Free. Nothing you type leaves your browser.

If this is an emergency, don't use this tool — call 000 now. Heavy bleeding, severe tummy pain, a gush of fluid, your baby not moving the way they usually do, or thoughts of harming yourself: call 000, go to your nearest emergency department, or ring your maternity unit straight away. Lifeline 13 11 14.

Written for anyone pregnant and weighing up first-trimester screening — it applies to you regardless of how you identify.

Your age when the baby's due (the one thing the tool needs)

This is what changes what a result means for you — risk tables use your age at delivery.

years

Which are you weighing up?

CFTS (12-week combined) NIPT (blood test) Both Not sure yet

Roughly how many weeks pregnant? (optional)

under 10 10–13 more than 13 not sure

Anything on your mind about it? (optional)

Type how you'd say it to a friend. This stays in your browser. If something feels urgent — heavy bleeding, severe pain, a gush of fluid, your baby not moving — don't use this box, ring 000 or your maternity unit now.

Or tap an example:

This tool helps you understand the numbers and prepare — it can't tell if something is urgent, and it can't tell you which test to choose. If you're worried it might be urgent, call 000 or your maternity unit now.