Pregnancy is an important time to closely monitor both the mother’s health and the baby’s development. Regular prenatal checkups allow healthcare professionals to monitor pregnancy, identify potential concerns, and provide guidance throughout each stage.

Prenatal care may include physical examinations, laboratory tests, ultrasound examinations, and other assessments depending on the pregnancy and the mother’s individual health needs. The World Health Organization (WHO) recommends routine antenatal care that includes maternal and fetal assessment, screening, preventive care, and health education.

If you are pregnant or planning a pregnancy, understanding some of the common tests can help you know what to expect during your prenatal visits.

What Is a Prenatal Checkup?

A prenatal checkup is a medical appointment during pregnancy where a healthcare professional evaluates the mother’s health and monitors the baby’s development.

The specific tests performed can vary based on:

• Stage of pregnancy

• Mother’s medical history

• Age and health conditions

• Pregnancy history

• Symptoms or risk factors

• Results from previous examinations

• Recommendations from the obstetrician or healthcare provider

Not every pregnant woman will need every available test. Your healthcare provider will determine which assessments are appropriate for your pregnancy.

Why Are Prenatal Tests Important?

Prenatal tests can provide valuable information about the health of the mother and developing baby.

Regular prenatal care gives healthcare professionals opportunities to:

• Monitor the mother’s blood pressure and general health

• Check for anemia and certain infections

• Monitor blood glucose

• Determine blood type and Rh status

• Monitor fetal growth and development

• Estimate gestational age

• Identify certain pregnancy-related risks

• Provide appropriate treatment or follow-up when needed

WHO recommends contacting a healthcare professional early in pregnancy and attending recommended prenatal visits throughout pregnancy.

Common Tests During Pregnancy

1. Complete Blood Count (CBC)

A complete blood count is a common blood test that measures different components of the blood.

During pregnancy, CBC testing may help healthcare professionals assess hemoglobin and other blood components, including information relevant to anemia.

Anemia is one of the conditions routinely considered during antenatal care, which is why hemoglobin testing is included among WHO’s recommended routine blood tests.

2. Blood Type and Rh Factor Testing

Blood typing determines a person’s blood group, while Rh testing identifies whether the blood is Rh-positive or Rh-negative.

Knowing the mother’s blood type and Rh status is an important part of prenatal care. WHO recommends blood group and Rh testing early in pregnancy because Rh-negative women may require additional management to prevent Rh sensitization.

3. Blood Sugar Testing

Blood glucose testing may be performed during pregnancy to screen for diabetes, including gestational diabetes.

WHO recommends blood glucose testing for gestational diabetes around 24–28 weeks of pregnancy. The exact test and preparation requirements may vary according to your healthcare provider’s recommendations.

If you are asked to undergo a fasting blood sugar test or an oral glucose tolerance test, make sure to follow the preparation instructions provided by your healthcare professional or laboratory.

4. Urinalysis

Urine testing is another common component of prenatal care.

A urine sample may be examined for different findings, including signs that could indicate a urinary tract problem or other conditions requiring further evaluation.

WHO includes assessment for urinary abnormalities and screening for asymptomatic bacteriuria as part of antenatal care.

Your healthcare provider may request urine testing at different points during pregnancy depending on your circumstances.

5. HIV, Syphilis, and Hepatitis B Screening

Screening for certain infections is an important part of prenatal care.

WHO recommends early screening for HIV, syphilis, and hepatitis B because identifying these infections during pregnancy can allow healthcare professionals to provide appropriate treatment and preventive measures.

Early testing can help healthcare providers make appropriate plans for the health of both mother and baby.

6. Ultrasound

Ultrasound uses sound waves to create images of the pregnancy.

Depending on the stage of pregnancy and the reason for the examination, ultrasound may be used to:

• Estimate gestational age

• Confirm pregnancy location and viability

• Determine the number of fetuses

• Monitor fetal development

• Assess certain fetal structures

• Identify some pregnancy-related concerns

WHO recommends that an ultrasound scan be available before 24 weeks of pregnancy as part of antenatal care.

The timing and number of ultrasound examinations may vary depending on the pregnancy and medical circumstances.

7. Blood Pressure Monitoring

Blood pressure is routinely checked during prenatal visits.

Monitoring blood pressure is important because high blood pressure during pregnancy can be associated with conditions such as preeclampsia.

WHO recommends measuring blood pressure at every antenatal care contact and screening for preeclampsia, including assessment for proteinuria, during pregnancy.

8. Screening for Group B Streptococcus

Group B Streptococcus, commonly called GBS, is a type of bacteria that can be present in the body without causing symptoms.

In some healthcare settings, pregnant women are screened for GBS later in pregnancy. WHO’s antenatal care guidance lists GBS screening at approximately 35–37 weeks.

Your obstetrician will advise you whether this screening is appropriate and when it should be performed.

9. Fetal Growth and Development Monitoring

Prenatal visits are not limited to laboratory tests.

Healthcare professionals may monitor fetal growth, measure the mother’s abdomen or fundal height when appropriate, and assess fetal movements later in pregnancy.

WHO recommends monitoring fetal growth and fundal height after approximately 24 weeks as part of antenatal care.

Prenatal Tests by Trimester

While every pregnancy is different, tests and assessments may generally be organized according to the stage of pregnancy.

First Trimester

During early pregnancy, healthcare providers may recommend:

• Blood tests

• CBC or hemoglobin testing

• Blood type and Rh testing

• HIV, syphilis, and hepatitis B screening

• Urine testing

• Blood pressure measurement

• Early ultrasound when appropriate

WHO recommends routine blood testing at the first prenatal contact and an ultrasound before 24 weeks.

Second Trimester

During the second trimester, prenatal care may include:

• Continued blood pressure monitoring

• Urine testing when indicated

• Monitoring maternal weight

• Fetal growth assessment

• Ultrasound examinations when appropriate

• Gestational diabetes screening, commonly around 24–28 weeks

Blood glucose testing during this period is recommended by WHO for screening for gestational diabetes.

Third Trimester

Later pregnancy visits may include:

• Blood pressure monitoring

• Urine testing when indicated

• Monitoring fetal growth

• Assessment of fetal movements

• Additional blood tests when indicated

• GBS screening in settings where it is recommended

The exact schedule depends on the mother’s health, pregnancy history, and recommendations from her healthcare provider.

Do All Pregnant Women Need the Same Tests?

No.

Prenatal testing should be tailored to the individual pregnancy. Some women may need additional laboratory tests, imaging, or specialist assessments because of existing medical conditions, previous pregnancy complications, multiple pregnancy, abnormal screening results, or other risk factors.

An additional test does not necessarily mean there is a serious problem. In many cases, healthcare professionals order further testing simply to obtain more information.

How Should You Prepare for Prenatal Tests?

Preparation depends on the specific examination.

Some tests require no special preparation, while others may require fasting or other instructions.

Before your appointment:

• Ask which tests will be performed.

• Confirm whether fasting is required.

• Follow the laboratory’s instructions carefully.

• Tell your healthcare provider about medications and supplements you take.

• Bring previous laboratory or ultrasound results when requested.

• Keep track of your prenatal appointments.

If you are unsure whether you should eat, drink, or take medication before a test, contact your healthcare provider or diagnostic laboratory before the appointment.

When Should You Seek Medical Attention?

Prenatal checkups are important, but pregnant women should not wait for their next scheduled appointment if they experience concerning symptoms.

WHO advises pregnant women to know where to seek care for warning signs such as vaginal bleeding, severe headache, high fever, abdominal pain, or significant swelling.

If you experience concerning symptoms during pregnancy, contact your healthcare provider or seek appropriate medical care promptly.

Make Prenatal Care Part of Your Pregnancy Journey

Regular prenatal checkups help healthcare professionals monitor changes throughout pregnancy and provide appropriate care when needed. Laboratory testing, ultrasound, blood pressure monitoring, and other assessments each provide different information about maternal and fetal health.

The tests you need will depend on your pregnancy and your healthcare provider’s recommendations. Following your prenatal care schedule and completing recommended examinations can help you stay informed throughout your pregnancy.

Sunrise Health Check Diagnostic Center provides laboratory and diagnostic services that may support prenatal and maternal health screening. If you have been referred for laboratory testing during pregnancy, contact the diagnostic center to confirm the available tests and preparation requirements.

Frequently Asked Questions

When should I have my first prenatal checkup?
It is recommended to contact a healthcare professional as early as possible after confirming pregnancy. Early prenatal care allows appropriate assessment, screening, and planning.

Do I need to fast before prenatal blood tests?
Not all prenatal blood tests require fasting. Some glucose tests may require specific preparation. Always follow the instructions given by your healthcare provider or laboratory.

Is ultrasound safe during pregnancy?
Ultrasound is widely used in prenatal care. WHO recommends an imaging ultrasound before 24 weeks as part of routine antenatal care.

What is the purpose of a prenatal blood test?
Prenatal blood tests can assess areas such as hemoglobin, blood type and Rh status, blood glucose, and certain infections.

Do I need prenatal tests even if I feel healthy?
Yes. Some pregnancy-related conditions may not cause noticeable symptoms, which is why routine prenatal care and recommended screening are important.

Conclusion

Prenatal checkups are an important part of maintaining maternal and fetal health throughout pregnancy. Common assessments may include blood tests, urine tests, blood pressure monitoring, blood glucose testing, infection screening, and ultrasound.

Because every pregnancy is different, your obstetrician or healthcare provider should determine which tests you need and when they should be performed. Regular prenatal care can provide an opportunity to monitor your health, track your baby’s development, and address potential concerns as early as possible.