Why Private Antenatal Infection Screening Is Vital for You
Private antenatal infection screening is a blood-based testing panel that checks for infections and immunity markers relevant to pregnancy health. It offers expectant and pre-conception women in the UK earlier, broader access to results that may support more informed conversations with their healthcare team — often before standard NHS pathways begin.
Private antenatal infection screening provides a structured way to check for infections and immunity gaps that may be relevant during pregnancy or when planning conception. Many women in London choose private testing because it allows them to access a broader panel of markers earlier — sometimes weeks or months before their first NHS midwife appointment. The goal is not to replace NHS antenatal care, but to complement it with earlier awareness.
At Health Screening Clinic in South Kensington, London, our nurse-led service provides testing and reporting only. We do not offer diagnosis, treatment, or prescriptions. Screening results are provided in a detailed written report that you can share with your midwife, obstetrician, or any appropriate healthcare professional.
In This Article
- What Is Included in Private Antenatal Infection Screening?
- Why These Infection Markers Matter During Pregnancy
- NHS vs Private Antenatal Screening in London
- Who Should Consider Private Antenatal Infection Screening?
- What Do Antenatal Infection Screening Results Mean?
- When and How Often Should You Screen?
- Frequently Asked Questions
What Is Included in Private Antenatal Infection Screening?
A comprehensive private antenatal infection screening panel typically covers a range of infection and immunity markers that may be relevant before or during pregnancy. At Health Screening Clinic, our Antenatal Infection & Immunity Screening includes 14 parameters across the following areas:
- Full Blood Count (FBC): provides a baseline view of blood cell health including red cells, white cells, and platelets.
- Blood Group and Rh Type: identifies blood group and Rhesus status, which may be relevant for pregnancy management.
- Atypical Antibody Screen: checks for unusual antibodies that could affect maternal-foetal blood compatibility.
- Haemoglobin Electrophoresis: screens for haemoglobin variants such as sickle cell and thalassaemia traits.
- Syphilis IgG/IgM: tests for syphilis antibodies, which are part of standard antenatal protocols.
- Glucose and Thyroid Function (Free T4, TSH): provides metabolic baseline markers relevant to pregnancy wellbeing.
- Rubella IgG: confirms immunity status to rubella (German measles).
- Toxoplasma IgG/IgM: checks for current or past exposure to toxoplasmosis.
- Cytomegalovirus (CMV) IgG/IgM: assesses exposure status to CMV, a common virus that may carry pregnancy-specific considerations.
- Hepatitis B Surface Antigen and Hepatitis C Antibodies: screens for hepatitis B and C infection markers.
- Varicella Zoster IgG: checks immunity to chickenpox.
- HIV 1 & 2 Antibodies: standard infection screening included in all UK antenatal pathways.
For further detail on rubella-specific testing, our guide to the importance of rubella immunity checks for pregnant women explains why this particular marker matters so much in antenatal planning.
Practical Insight: Several of these infections may not produce obvious symptoms but can still be relevant during pregnancy. Blood-based screening offers a structured way to check for them before symptoms would typically prompt investigation.
Why These Infection Markers Matter During Pregnancy
Certain infections may carry different significance during pregnancy compared to other times in life. Some, like rubella, toxoplasmosis, or CMV, can sometimes be associated with pregnancy-specific considerations that healthcare professionals may want to monitor or discuss. Others, such as hepatitis B and HIV, are routinely screened for because early awareness can support appropriate clinical pathways managed by your medical team.
The value of private antenatal infection screening is that it provides this information earlier — before routine NHS booking appointments — and often in a broader panel than standard NHS pathways may initially cover. For example, toxoplasma and CMV screening are not routinely included in all NHS antenatal panels, yet many women and their healthcare providers find the information useful. Our article on monitoring CMV infection risks during pregnancy in London explains why this marker is increasingly requested.
Practical Insight: Knowing your immunity status before conception — rather than discovering a gap during pregnancy — may give you and your healthcare team more time to plan appropriately.
NHS vs Private Antenatal Infection Screening in London
Both NHS and private routes play important and complementary roles in antenatal care. Understanding how they differ can help you decide whether private antenatal infection screening adds value to your personal situation.
| Feature | NHS Antenatal Screening | Private Antenatal Screening (London) |
|---|---|---|
| Timing | Usually begins at booking appointment (8–12 weeks) | Available pre-conception or at any stage of pregnancy |
| Panel breadth | Core markers (HIV, hepatitis B, syphilis, rubella, FBC, blood group) | Broader panel including CMV, toxoplasma, varicella, hepatitis C |
| CMV and toxoplasma | Not routinely included in all NHS trusts | Included as standard |
| Waiting times | Depends on local NHS capacity | Typically same-week or next-day appointments |
| Written report | Results communicated via midwife or GP | Detailed report provided directly to you |
| Pre-conception use | Not typically available before pregnancy | Designed to support planning before conception |
Private antenatal infection screening does not replace NHS midwifery care. Instead, it complements it by offering earlier or broader results that you can bring to your NHS appointments for discussion with your clinical team.
Who Should Consider Private Antenatal Infection Screening?
Private antenatal infection screening may be particularly valuable for women in the following situations:
- Women actively planning conception who want to check immunity and infection status before becoming pregnant.
- Those in early pregnancy who would like results before their NHS booking appointment.
- Women who have recently relocated to London and do not yet have an NHS midwife assigned.
- Anyone with occupational or travel-related exposure to infections such as CMV, toxoplasma, or hepatitis.
- Women with a previous pregnancy where an infection-related concern arose and who want earlier reassurance this time.
- Those who would like a broader panel than NHS standard screening may initially offer.
For a more personalised approach to women’s screening across all life stages, our guide to bespoke women’s health screening may be helpful in understanding how antenatal testing fits within a wider female health strategy. Women who are actively planning conception may also find it useful to assess ovarian reserve — our guide to the AMH test and ovarian reserve explains what this marker reveals about fertility timeline.
Practical Insight: Pre-conception screening is often the most strategic timing for antenatal infection testing. Knowing your immunity status before pregnancy gives you and your healthcare team more flexibility in planning.
What Do Private Antenatal Infection Screening Results Mean?
Results from antenatal infection screening typically fall into a few clear categories, though interpretation should always be discussed with an appropriate healthcare professional.
Immunity confirmed (IgG positive, IgM negative)
A positive IgG result with a negative IgM for infections such as rubella, varicella, or CMV generally suggests past exposure or vaccination, indicating that immunity may be present. This is often a reassuring finding.
No immunity detected (IgG negative)
A negative IgG result for rubella or varicella may suggest that immunity is not established. This information can be important to discuss with your healthcare team, particularly before conception, so that appropriate medical advice can be sought.
Possible recent or active infection (IgM positive)
A positive IgM result may sometimes indicate recent or active infection, though false positives can occur. If an IgM marker is flagged, medical advice is the appropriate next step so the result can be interpreted in full clinical context.
Hepatitis and HIV markers
A negative hepatitis B surface antigen, negative hepatitis C antibody, and negative HIV result are typically reassuring. Any positive or reactive result should be discussed with an appropriate healthcare professional for confirmation and guidance.
Practical Insight: Screening results are most useful when shared with your midwife or obstetrician. A clear, written report makes it easier for your clinical team to incorporate the findings into your ongoing care plan.
When and How Often Should You Screen?
The ideal timing for private antenatal infection screening depends on your circumstances:
- Pre-conception: testing before pregnancy is often the most strategic approach. It allows time to discuss any immunity gaps with your healthcare provider and plan accordingly.
- Early pregnancy: if pre-conception screening was not completed, early pregnancy testing can still provide valuable baseline information before NHS booking bloods.
- Repeat screening: in some cases, women may need to recheck certain markers — for example, if there has been a known exposure to an infection during pregnancy or if a previous result was borderline. Medical advice should guide repeat testing decisions.
For general guidance on how to avoid preparation errors that can affect blood test accuracy, our article on common mistakes that affect blood test results covers practical steps for all screening appointments.
Practical Insight: One comprehensive pre-conception panel is often sufficient for baseline purposes. Any further testing during pregnancy would typically be guided by your midwife or obstetrician based on clinical need.
Frequently Asked Questions
What does private antenatal infection screening include?
Private antenatal infection screening typically includes blood tests for rubella immunity, toxoplasma, CMV, varicella, hepatitis B and C, HIV, syphilis, blood group and Rh type, haemoglobin electrophoresis, atypical antibodies, FBC, glucose, and thyroid function. Together these markers provide a broad baseline for pregnancy-related awareness.
Is private antenatal infection screening different from NHS screening?
Private antenatal infection screening often includes a broader range of markers than standard NHS antenatal panels. For example, CMV and toxoplasma are not routinely tested on the NHS in all trusts but are included in private panels. Private screening can also be accessed earlier, including before conception, rather than waiting for NHS booking appointments.
Can I have antenatal infection screening before getting pregnant?
Yes. Many women choose private antenatal infection screening before conception to understand their immunity and infection status in advance. Pre-conception testing allows more time to discuss any findings with a healthcare professional and plan accordingly, which can feel more reassuring than waiting until pregnancy has begun.
Why is rubella immunity important during pregnancy?
Rubella immunity is routinely checked as part of antenatal screening because rubella infection during pregnancy may carry specific considerations. Private antenatal infection screening confirms whether IgG antibodies are present, suggesting past immunity through vaccination or exposure. If immunity is not confirmed, medical advice can help guide next steps before conception.
What does a positive IgM result mean in private antenatal infection screening?
A positive IgM result may sometimes suggest recent or active infection, though false positives can occasionally occur. If an IgM marker is flagged during private antenatal infection screening, medical advice should be sought so the finding can be properly assessed in context by your healthcare team.
Is CMV screening included in NHS antenatal care?
CMV screening is not routinely part of NHS antenatal panels in most trusts. However, many women choose to include it through private antenatal infection screening because CMV is a common virus that may carry specific considerations during pregnancy. Knowing your exposure status can support more informed clinical discussions.
How long does it take to receive private antenatal screening results?
At Health Screening Clinic, most private antenatal infection screening results are available within a few working days. Results are provided in a detailed written report which you can review personally and share with your midwife, obstetrician, or any appropriate healthcare professional for further guidance.
Can I book private antenatal infection screening in London?
Yes. Health Screening Clinic in South Kensington, London, offers a dedicated Antenatal Infection & Immunity Screening package with 14 parameters. This nurse-led service provides testing and clear written reporting, making it a practical option for women planning pregnancy or seeking broader screening alongside their NHS care.
Should I share my private screening results with my NHS midwife?
Yes, sharing your private antenatal infection screening results with your midwife or obstetrician is recommended. Your clinical team can use the information alongside their own assessments to build a more comprehensive picture of your pregnancy health. A clear written report makes this process straightforward.
Planning Ahead with Confidence
Private antenatal infection screening offers a practical, proactive step for women who want earlier visibility of their immunity and infection status. Whether you are planning conception, newly pregnant, or simply prefer a broader panel than standard NHS pathways may provide, structured blood-based testing can support calmer, better-informed decisions.
At Health Screening Clinic, our nurse-led team provides compassionate, confidential testing with clear written reports designed to support your ongoing conversations with your healthcare providers.
Disclaimer
This article is for educational and informational purposes only. It does not replace professional medical advice. Individual symptoms, health concerns, and test results should be assessed by an appropriate healthcare professional. Health Screening Clinic provides testing and reporting only and does not provide diagnosis, treatment, or prescriptions. No specific outcome is guaranteed or implied.
Written Date: 7 April 2026
Next Review Date: 7 April 2027