Prenatal Appointments and Tests: What to Expect
Prenatal care means the regular check-ups you have during pregnancy. They help your care team follow your health and your baby’s growth, and they give you time to ask questions.
The schedule and the tests differ between countries, clinics, and individual pregnancies. This article describes a typical pattern, with examples from the NHS in the UK and from the U.S. Office on Women’s Health, so you know what to ask your own team.
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Quick Answer
Most women have prenatal visits about once a month at first, and then more often as the due date gets closer (1). The first visit includes a health history, a check-up, and blood and urine tests. Later visits add ultrasound scans, screening tests, and checks of your blood pressure and your baby’s growth. Your own schedule may be different, especially if you have a health condition.
How Often Are Prenatal Visits?
According to the U.S. Office on Women’s Health, routine check-ups usually happen monthly from about week 4 to week 28, twice a month from week 28 to week 36, and weekly from week 36 until birth (1). Women with a high-risk pregnancy are seen more often.
The NHS in the UK uses a different pattern. A first baby usually means at least 10 appointments and 2 ultrasound scans, while a woman who has given birth before usually has at least 7 appointments (2). This is a good example of why you should ask your own team for your exact schedule.
The First Visit
The first visit is often the longest. In the UK it is called the booking appointment, and it usually takes place between 8 and 12 weeks (2). Your midwife or doctor will ask about your last period, earlier pregnancies, health conditions (including any that run in your family or your partner’s family), mental health, lifestyle, and your work and home situation. They will also check your blood pressure and urine.
Depending on how far along you are, the first visit may also include an ultrasound (3). It shows whether the pregnancy is in the uterus and whether a heartbeat can be seen. If the scan is very early, the heartbeat may not be visible yet, and the scan is repeated later.
You may have a full physical exam, and your team will work out your due date. Answer the questions as honestly as you can, because it helps your team give you the right care. Blood tests at the first visit commonly check:
- Your blood type and Rh factor.
- Anemia.
- Infections such as hepatitis B, syphilis, and HIV.
- Your immunity to rubella and chickenpox.
The exact list depends on where you live. If you are not sure why a test is offered, ask your midwife or doctor to explain it.
At the first visit you may also have a urine test and tests for gonorrhea and chlamydia (3). At later visits, urine and blood pressure checks help to spot urine infections and pre-eclampsia, a pregnancy condition with high blood pressure (2).
What Happens in Each Trimester
First Trimester
After the first visit, the main event is usually a dating scan between 11 and 14 weeks, according to the NHS antenatal appointment schedule (2). It confirms your due date, checks the baby’s development, and shows whether you are expecting more than one baby. If you are worried about nausea in these weeks, see Morning Sickness: What Helps and When It’s Too Much.
Optional screening for conditions such as Down’s syndrome is often offered around the same time. It is usually a blood test combined with an ultrasound. In the U.S., this screening is usually done at 11 to 14 weeks. The ultrasound part, called nuchal translucency, measures a space at the back of the baby’s neck (1).
Second Trimester
Visits in the second trimester are usually short checks of your blood pressure, your urine, and your baby’s growth. To check growth, your provider measures the height of the top of the uterus, called fundal height, and listens to the baby’s heartbeat (3). These short visits are also a good time to ask about anything that worries you.
Many women have a detailed scan between 18 and 21 weeks, often called the 20-week scan. It checks how the baby is developing. In the U.S., an ultrasound is also often done between 18 and 20 weeks (1).
If early screening was not possible, another blood screening test may be offered between 14 and 20 weeks. Many women also start to feel their baby move in these weeks. Tell your midwife or doctor if you have questions about movements.
Third Trimester
Between about 24 and 28 weeks, you may be tested for gestational diabetes, depending on your risk and your country’s guidance. At 28 weeks, many women also have a blood test that checks iron levels and blood group. An injection is offered if the baby is at risk of rhesus disease.
In the U.S., a swab for group B strep is usually done at 36 to 37 weeks. Later visits cover your baby’s position and how to prepare for birth. For practical tips, see How to Actually Prepare for Labor.
What Screening Tests Can and Cannot Tell You
Screening tests in pregnancy show a higher or lower chance of a condition. They do not give a definite diagnosis (4). A higher-chance result usually leads to more information and further tests, not to a final answer.
Screening is optional. You can choose all, some, or none of the tests, and you can change your mind later, although some tests must be done at specific times. If you have a condition such as diabetes or high blood pressure, or you had complications in an earlier pregnancy, you may be offered extra tests or monitoring. Your age and your family history can also affect which extra tests are offered (1).
Questions to Ask at Your Visits
Write your questions down before each visit, because it is easy to forget them. These are good ones to start with:
- How many visits will I have, and when?
- Which tests are offered, and which are optional?
- Who should I call if something worries me, and what is the after-hours number?
- What should I do if my baby moves less than usual?
- Which childbirth classes are available where I live?
- Can I meet a social worker to ask about help with costs and time off work?
When to Call Between Appointments
You do not need to wait for your next visit if something feels wrong. Contact your midwife, doctor, or maternity unit if you have:
- Vaginal bleeding.
- Severe or constant belly pain.
- Fluid leaking from the vagina.
- A baby who moves much less than usual.
- A high temperature.
- Vomiting so often that you cannot keep fluids down.
If you are unsure, call anyway. Maternity teams expect these calls, and it is always better to ask than to wait.
Conclusion
Prenatal care follows a general pattern: a longer first visit, regular short check-ups, a few key scans, and screening tests at set times. The details change from country to country and from one pregnancy to another. Ask your own team for your schedule and keep your appointments.
Use each visit to ask questions, and do not hold back about symptoms or worries. The more your team knows, the better they can look after you and your baby. For guides on every stage of pregnancy, birth, and recovery, see the pregnancy and postpartum guide hub.
