Pregnancy and infections: anticipating exposures

Infections do not all have the same consequences during pregnancy. The agent, term of pregnancy and previous results determine the assessment. Preparing information helps the team that follows you.

Topic updated: 09/10/2026

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EssentialShort answer

To be retained

The starting points

Discuss vaccines and results before pregnancy when possible. During pregnancy, quickly report fever, identified contact or recalled food associated with symptoms.

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Adapting prevention to exposure

Very different agents can reach the fetus.

Food and soil

Toxoplasmosis can be acquired by undercooked meat or contaminated materials; listeriosis concerns certain foods. Cooking, hygiene and targeted food recommendations complement each other.

Contacts with young children

CMV may be present in saliva and urine. Hand hygiene and lack of sharing of put-in-mouth utensils limit exposures.

Sexual contact and travel

Screening for syphilis helps prevent congenital transmission. For Zika, examine travel and sexual transmission with the health care team.

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Prepare an appointment or call

Bring the full dates and minutes.

Rubella

Rubella can have serious fetal consequences, especially in early pregnancy. Discuss exposure quickly and check vaccination before pregnancy.

Results

Bring previous serologies, vaccine evidence and pregnancy term. A positive antibody can have several interpretations.

Appeals

If symptoms or exposure are identified, use the contact provided by your maternity. A distress calls for help.

QuestionsClarifications

Frequently Asked Questions

Does an exhibition prove an infection of the foetus?

No. Exposure, maternal infection and transmission to the foetus are distinct steps. The assessment depends on the agent, dates and examinations.

Does a positive antibody only date an infection?

No. Precise markers and previous results are required; further reviews may be required.

Moving from reading to exchanging

Keep the results complete with their dates and prepare questions on their interpretation. Organize information for a health professional →

Institutional sources

External sources can evolve. Check their date and instructions for your territory.