Group B Streptococcus

A vaginal swab test for Group B Streptococcus, usually taken in the last weeks of pregnancy to check whether the bacteria is present ahead of birth.

Sample
Swab
Collection
Vaginal swab sample at clinic or nurse visit; also home kit £70
Results in
3 days
Biomarkers
1
Tests for
  • Group B Streptococcus

Test specifications

Provider
Better2Know
Sample type
swab
Collection method
vaginal swab sample at clinic or nurse visit; also home kit £70
Turnaround time
3 days
Biomarkers tested
1
At-home test
No
Doctor reviewed
No
Gender focus
Both

What's tested

1 biomarker as listed by Better2Know.

  • Group B Streptococcus

About this test

Group B Streptococcus (GBS) is a bacterial infection that can be passed from mother to baby during childbirth, and testing is usually done in the final weeks of pregnancy to inform decisions around the birth. This version has the swab taken by a clinician or nurse rather than at home.

Better2Know does not list a wider comparison group for this test, so it cannot be ranked against named rivals here. Better2Know's own home kit version of the same test is available for £70, £105 less than this clinic-based version.

It scores well for collection convenience, since a home nurse visit or clinic appointment is available and results come back within three days. It scores lower for results and follow-up because results are not reviewed by a doctor as standard, and a midwife would need to be informed of a positive result directly rather than through the test provider.

Who is it for?

This suits someone who would rather have a clinician or nurse take the swab than do it themselves, for example alongside another appointment in the final weeks of pregnancy.

If cost matters more than having the sample taken for you, Better2Know's own home kit version of this test covers the same GBS marker for £70.

How it works

A clinician or nurse takes a vaginal swab, either at a Better2Know clinic or during a home nurse visit, and sends it to the lab. Results are back within three days. The fact sheet does not show results being reviewed by a doctor as standard, and Better2Know's own guidance says a positive result should be reported to your midwife directly.

Pros & cons

Pros

  • Swab taken by a clinician or nurse rather than self-collected.
  • A home nurse visit option is available if you cannot get to a clinic.
  • Results back within three days of the sample reaching the lab.

Cons

  • At £175, it costs £105 more than Better2Know's own home kit version of the same test.
  • No doctor review of results as standard.

Our editorial score

Compare Health Test Score Clinic GBS swab; a cheaper home kit is also available
Editorial confidence: 9.0/10

This test uses a vaginal swab, taken at a clinic or during a nurse visit, to check for Group B Streptococcus. At £175 it costs £105 more than Better2Know's own home kit version of the same test, though it saves you doing the swab yourself. Results are not reviewed by a doctor as standard.

Score breakdown

  • Clarity and documentation 9.0/10

    The listing publishes a detailed description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 6.6/10

    1 biomarkers, placing it in the 36th percentile of immunity tests we track.

  • Collection convenience 9.0/10

    A swab sample you take at home, no needle; a home nurse visit is offered; results in around 3 days, in line with or faster than similar tests.

  • Results and follow-up 3.0/10

    Results are not doctor-reviewed and no consultation is included; the provider does not describe the report format.

  • Trust signals 6.5/10

    Trustpilot 4.2 from 775 reviews; CQC registered; trading 18+ years.

  • Value for money 4.7/10

    £175.00 against a median of £129.00 for the 79 similarly sized immunity tests we track (+36%).

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

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