pregnancy screening test preparation
Informed by recognized medical guidance
Overview
Pregnancy screening tests are blood tests and ultrasound scans offered to all pregnant women to check on the health of the baby and the mother. They can find out if there is a higher chance of certain genetic conditions, such as Down's syndrome or spina bifida.
Key facts
- Screening is optional and you can choose which tests to have.
- Tests are usually done in the first and second trimesters of pregnancy.
- Screening results show if there is a higher chance of a condition, but they don't give a definite diagnosis.
Yes, pregnancy screening tests are routinely offered as part of antenatal care in many countries, including the UK.
They are offered to all pregnant women, regardless of age or health. Some women may be offered additional tests based on their personal or family history.
Symptoms
- Severe abdominal pain
- Heavy vaginal bleeding
- Signs of stroke (sudden weakness, slurred speech, vision changes)
- ⚠Sudden swelling of hands, face, or feet
- ⚠Severe headache that doesn't go away
- ⚠Blurred vision or seeing flashing lights
Common symptoms
- Advanced maternal age (35 or older)
- Family history of genetic conditions
- Previous pregnancy with a chromosomal condition
- Abnormalities seen on a routine ultrasound
Causes
Main causes
- Screening tests are not caused by a condition; they are done to find out if the baby has a higher chance of certain chromosomal or structural conditions.
Risk factors
- Maternal age (older age increases chance of chromosomal conditions)
- Family history of genetic disorders
- Previous pregnancy with a genetic condition
- Certain ethnic backgrounds (e.g., higher risk for sickle cell disease)
When to see a doctor
See a doctor urgently if:
- If you have any of the emergency symptoms listed above, call your local emergency number immediately.
Book a routine appointment if:
- Talk to your midwife or doctor about screening options at your first antenatal appointment (usually before 10 weeks pregnant).
- Schedule your combined screening test (blood test and nuchal translucency ultrasound) between 11 and 14 weeks if you choose to have it.
Diagnosis
Pregnancy screening involves a combination of blood tests and ultrasound scans. The results are combined with your age and other factors to give a risk estimate.
Tests that may be done
- Combined screening test (blood test and nuchal translucency ultrasound) – done around 11–14 weeks
- Quadruple blood test – done around 15–20 weeks if you miss the first trimester screen
- Mid-pregnancy ultrasound scan (anomaly scan) – done around 18–21 weeks to check baby's physical development
What to expect at your appointment
The blood test involves a small sample from your arm. The ultrasound is a gentle scan on your belly using a handheld device. You may need to have a full bladder for the early ultrasound. Results are usually available within a few days to a week. Your midwife or doctor will explain what they mean.
Treatment
Screening tests are not a treatment. If the screening shows a higher chance of a condition, you will be offered further diagnostic tests (like chorionic villus sampling or amniocentesis) to get a definite answer. These tests carry a small risk of miscarriage, so you will be given time to decide.
Self-care at home
- Eat a balanced diet and take folic acid as recommended by your healthcare provider.
- Stay active with gentle exercise like walking, unless your doctor advises otherwise.
- Get enough rest and manage stress with relaxation techniques.
Medical treatments
If a condition is diagnosed, you will be referred to a specialist team for support, which may include genetic counseling, specialist scans, and planning for the baby's care after birth. Treatment options depend on the specific condition and will be discussed with you by your healthcare team.
Living with this condition
While waiting for screening results, try to focus on your overall health and well-being. If you receive a high-risk result, give yourself time to process the information and talk to your partner, family, or a counselor.
Lifestyle tips
- Avoid alcohol and smoking during pregnancy.
- Limit caffeine.
- Take any prescribed supplements as directed.
Diet and exercise
Eat a varied diet with plenty of fruits, vegetables, whole grains, and protein. Regular gentle exercise like swimming or prenatal yoga can help you stay healthy. Always check with your midwife before starting a new activity.
Mental health and emotional wellbeing
It's normal to feel anxious about screening results. If you feel overwhelmed, talk to your midwife or doctor. They can provide information and connect you with support services.
Prevention
Most genetic conditions cannot be prevented, but screening can help you prepare and make informed decisions about your pregnancy and your baby's care.
Complications
If left untreated
- If a condition is not identified, you may miss the chance to prepare for your baby's special needs.
- Some conditions may require immediate medical care after birth, and knowing in advance helps the healthcare team plan.
Long-term outlook
The vast majority of pregnancies result in a healthy baby. Screening is a personal choice, and for many women the results provide reassurance. If a condition is found, modern medicine offers many ways to support you and your baby. You are not alone.
Find support
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 29, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.