Combined screening test dating scan

This screening is to check whether you already have diabetes or if you are at risk of developing diabetes while you are pregnant (gestational diabetes).

Diabetes is when you have too much sugar in your blood, and it can make you sick and affect your baby’s growth.

On this page you can find out about: Screening tests can tell you whether you or your baby are more likely to have a medical condition.

If you are 14–20 weeks pregnant, this screening is a blood test only.

Screening is your decision – your midwife (or specialist doctor) will give you information and support to help you to decide whether to have screening or not.

Talk to them about what’s right for you and your baby.

This blood test is free, and it checks: For more information, see the Antenatal blood test fact sheet on the National Screening Unit website.

You will be offered HIV screening at the same time as you are offered the first antenatal blood test (see above).

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