Lifestyle, Behaviour, and Their Impact on Health
With Sophie and Theo, Sociology & Mental Health Specialist
Key Takeaways
- Because lifestyle factors — diet, activity, smoking, alcohol, and substance use — are among the most modifiable influences on pregnancy outcomes.
- But midwives work with real women in complex social contexts, so the approach to behaviour change matters as much as the advice itself.
- Smoking is strongly associated with preterm birth, placental abruption, fetal growth restriction, and sudden infant death.
- Midwives offer carbon monoxide testing and refer to stop smoking services at every contact.
- No safe level has been established, so abstinence is recommended.
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Full Transcript
Sophie: Our final episode looks at lifestyle, behaviour, and their impact on health. I'm Sophie, and joining me is Theo, our Sociology and Mental Health Specialist. Theo, why is the midwife's role in health behaviour so significant?
Theo: Because lifestyle factors — diet, activity, smoking, alcohol, and substance use — are among the most modifiable influences on pregnancy outcomes. But midwives work with real women in complex social contexts, so the approach to behaviour change matters as much as the advice itself.
Sophie: What does the evidence say about smoking in pregnancy?
Theo: Smoking is strongly associated with preterm birth, placental abruption, fetal growth restriction, and sudden infant death. Midwives offer carbon monoxide testing and refer to stop smoking services at every contact. Brief intervention and warm referral are the gold standard.
Sophie: What do we know about safe levels of alcohol in pregnancy?
Why is lifestyle, behaviour, and their impact on health important in midwifery practice?
Theo: No safe level has been established, so abstinence is recommended. Fetal alcohol spectrum disorders are entirely preventable. Midwives need to ask about alcohol sensitively and without judgement, in a way that facilitates honest disclosure.
Sophie: How does nutrition link to outcomes and what are the key messages?
Theo: Folate in the periconceptual period reduces neural tube defect risk. Iron-deficiency anaemia affects maternal energy and fetal development. Vitamin D is recommended throughout pregnancy. Gestational diabetes management is heavily diet-based, making nutritional guidance a core midwifery skill.
Sophie: Physical activity is sometimes a grey area — what should midwives advise?
Theo: Moderate activity is beneficial throughout uncomplicated pregnancy — reducing gestational diabetes risk, supporting mental health, and improving labour outcomes. Women active before pregnancy can continue. Contact sports and activities with fall risk should be avoided from mid-pregnancy.
How does lifestyle, behaviour, and their impact on health work in a healthcare context?
Sophie: What is motivational interviewing and why is it valuable in this context?
Theo: Motivational interviewing is a collaborative, person-centred approach to exploring ambivalence about behaviour change. Rather than telling women what to do, it asks what matters to them and what barriers they face — far more likely to produce sustained change than directive advice.
Sophie: Advocating for structural change — a powerful note to end on. Thank you, Theo.
Theo: Midwives see the consequences of inequality every day. Using that knowledge to advocate for better services and fairer policies is one of the most important things a midwife can do beyond individual care.