Understanding Sexually Transmitted Infections (STIs) in Pregnancy
Understanding Sexually Transmitted Infections (STIs) in Pregnancy and Breastfeeding: A Comprehensive Guide
Sexually Transmitted Infections (STIs) are infections passed from one person to another through sexual contact. During pregnancy, these infections can have significant implications for both the mother’s health and the baby’s development. This guide will help you understand the risks of STIs in pregnancy, how they affect fertility, miscarriage, and congenital infections, and whether it’s safe to breastfeed if you have an STI.
What Are Sexually Transmitted Infections (STIs)?
Sexually Transmitted Infections (STIs) are infections spread through sexual contact, including vaginal, anal, or oral sex. Some of the most common STIs are:
• Chlamydia
• Gonorrhoea
• Syphilis
• HIV
• Herpes (HSV)
• Human Papillomavirus (HPV)
• Trichomoniasis
Many STIs can occur without symptoms, making regular screening essential, especially during pregnancy.
How Can STIs Affect Pregnancy?
STIs can cause various complications during pregnancy if untreated, including:
• Miscarriage or Stillbirth: Infections like syphilis and herpes increase the risk of miscarriage (before 24 weeks) or stillbirth (after 24 weeks).
• Preterm Labour: Infections like gonorrhoea and trichomoniasis can cause premature birth, which can lead to additional health risks for the baby.
• Congenital Infections: Some infections, such as HIV, syphilis, and herpes, can be passed from the mother to the baby during pregnancy or childbirth, leading to congenital infections. These can cause serious health problems for the baby, including developmental delays, blindness, or hearing loss.
Congenital Infections and Their Impact on the Baby
A congenital infection occurs when a mother passes an infection to her baby during pregnancy or delivery. Some of the risks associated with congenital infections include:
• Birth Defects: Syphilis can cause congenital anomalies, such as bone deformities or organ damage.
• Low Birth Weight: Babies born to mothers with untreated STIs are at higher risk for low birth weight, which may lead to other health issues.
• Long-Term Health Problems: Some infections, like HIV, can lead to long-term health complications for the baby.
STIs and Infertility
Untreated STIs can affect a woman’s fertility, causing long-term damage to the reproductive system. The two most common consequences are:
• Pelvic Inflammatory Disease (PID): Infections like chlamydia and gonorrhoea can cause PID, which can lead to blocked fallopian tubes and increase the risk of infertility.
• Ectopic Pregnancy: Some STIs increase the likelihood of an ectopic pregnancy, where the embryo implants outside the womb, usually in the fallopian tube, a condition that requires emergency medical attention.
STIs and Miscarriage
Some STIs, such as syphilis and herpes, are associated with an increased risk of miscarriage or stillbirth. Treating these infections promptly during pregnancy is crucial for reducing these risks.
Diagnosing and Treating STIs During Pregnancy
In the UK, routine screening for certain STIs, such as HIV, syphilis, and hepatitis B, is part of antenatal care. Depending on your risk factors, you may also be offered tests for chlamydia and gonorrhoea. Most STIs can be treated safely during pregnancy with antibiotics or antiviral medications. You can also arrange a blood test and urine test for you and your partner to screen for the most common forms of STI which might impact on your pregnancy.
Preventing STIs in Pregnancy
Here are ways to reduce the risk of contracting an STI during pregnancy:
• Use Condoms: Using condoms during sex can help prevent STIs.
• Limit Sexual Partners: Having fewer sexual partners reduces the risk of exposure to infections.
• Regular Testing: If you or your partner are at risk, regular STI screenings are essential, especially if you are planning a pregnancy or are already pregnant.
Breastfeeding and STIs: Is It Safe?
Whether it’s safe to breastfeed if you have an STI depends on the type of infection. Here’s a breakdown of the most common STIs and their impact on breastfeeding:
HIV (Human Immunodeficiency Virus)
• Transmission through breast milk: Yes, HIV can be passed to your baby through breast milk.
• Guidance: In the UK, mothers with HIV are advised not to breastfeed and to use formula milk instead to avoid any risk of transmitting the virus. Antiretroviral therapy (ART) during pregnancy and postpartum can reduce transmission risks significantly, but breastfeeding is generally discouraged unless formula feeding is not safe or accessible.
Hepatitis B
• Transmission through breast milk: No, Hepatitis B is not transmitted through breast milk.
• Guidance: It is safe to breastfeed if your baby receives the Hepatitis B vaccine at birth, which is standard practice in the UK for babies born to mothers with the virus.
Hepatitis C
• Transmission through breast milk: No, Hepatitis C is not passed through breast milk.
• Guidance: It is generally safe to breastfeed, but if you have cracked or bleeding nipples, you should avoid breastfeeding from that breast until it heals, as the virus may be present in blood.
Herpes (HSV)
• Transmission through breast milk: No, herpes is not passed through breast milk.
• Guidance: If you have active lesions on or near your nipples, avoid breastfeeding from the affected breast until the sores have healed to prevent passing the virus to your baby through direct contact. You can pump and discard the milk from the affected breast or use the unaffected breast.
Syphilis
• Transmission through breast milk: No, syphilis is not transmitted through breast milk.
• Guidance: It is safe to breastfeed unless there are active sores on the breast or nipple. If there are sores, wait until they heal before breastfeeding.
Gonorrhoea and Chlamydia
• Transmission through breast milk: No, neither gonorrhoea nor chlamydia is passed through breast milk.
• Guidance: You can breastfeed safely if you are being treated for these infections with antibiotics that are safe for breastfeeding.
Human Papillomavirus (HPV)
• Transmission through breast milk: No, HPV is not passed through breast milk.
• Guidance: Breastfeeding is safe if you have HPV, as the virus typically spreads through skin-to-skin contact, not through breast milk.
General Breastfeeding Precautions for Mothers with STIs
• Follow Medical Advice: Ensure any medications you’re taking for your STI are safe for breastfeeding.
• Hand Hygiene: Wash your hands before breastfeeding, especially if you have any open sores or lesions.
• Avoid Breastfeeding with Active Lesions: If you have any sores on your breast (e.g., from herpes or syphilis), avoid feeding from that breast until it heals.
Emotional Support and Wellbeing
Coping with an STI during pregnancy and breastfeeding can be stressful, but support is available. Talk to your GP, midwife, or a counsellor if you’re feeling anxious. Support groups and charities, such as the Terrence Higgins Trust and FPA UK, can also offer advice and emotional support.
Key Takeaways
• STIs can pose risks to both mother and baby during pregnancy, including infertility, miscarriage, and congenital infections.
• Most STIs can be safely treated during pregnancy with medications that protect both mother and baby.
• Breastfeeding is generally safe with most STIs, though HIV-positive mothers are advised to avoid breastfeeding to prevent transmission through breast milk.
• Early screening, treatment, and regular antenatal care can greatly reduce the risks associated with STIs in pregnancy.
Further Resources:
• NHS Sexual Health Clinics: For confidential advice, testing, and treatment, visit your local clinic or use the NHS clinic finder.
• NHS STI Guidance: Learn more about STIs and pregnancy at NHS UK.
For personalised advice, speak to your healthcare provider or visit your local sexual health clinic. With the right care and support, you can ensure a safe and healthy pregnancy and breastfeeding journey.
This guide is based on current UK recommendations and clinical guidelines to help you navigate pregnancy and breastfeeding while managing an STI.
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