1.3 Informed Consent, Capacity, Advocacy & Human Rights

Informed Consent, Capacity, Advocacy & Human Rights

Respect for autonomy, human dignity, and bodily integrity lies at the heart of modern midwifery ethics and UK healthcare jurisprudence. Midwives frequently support women navigating complex clinical choices during pregnancy and childbirth. Understanding the legal definitions of consent, the statutory framework of capacity, and the absolute rights of pregnant women is essential for safe, ethical practice.

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The Legal Standard of Informed Consent: Montgomery v Lanarkshire

Historically, UK medical law assessed consent and disclosure of risk using the Bolam test (Bolam v Friern Hospital Management Committee [1957]), reinforced by Sidaway [1985]. Under Bolam, a clinician was not negligent if they acted in accordance with a responsible body of medical opinion—effectively allowing doctors to determine what information patients "needed" to know.

The Montgomery Watershed

This paternalistic doctrine was decisively overturned by the UK Supreme Court in the historic case of Montgomery v Lanarkshire Health Board [2015] UKSC 11.

• Case Background: Nadine Montgomery, a woman of short stature with insulin-dependent diabetes, was pregnant with a baby at heightened risk of macrosomia. Her obstetrician chose not to disclose the 9–10% risk of shoulder dystocia associated with vaginal birth, fearing that disclosing the risk would prompt Montgomery to request an elective caesarean section. During delivery, severe shoulder dystocia occurred; the infant was deprived of oxygen and suffered severe cerebral palsy and brachial plexus injury.
• Supreme Court Ruling: The Supreme Court ruled in Mrs. Montgomery's favour, holding that adult patients are autonomous individuals entitled to make decisions about their own medical treatment based on full information.

The Material Risk Standard

The Supreme Court established that a clinician has a legal duty to take reasonable care to ensure that the patient is aware of any material risks involved in any recommended treatment, and of any reasonable alternative or variant treatments.

The Test of Materiality (Montgomery [2015]): A risk is material if, in the circumstances of the particular case:

1. A reasonable person in the patient's position would be likely to attach significance to the risk; OR
2. The clinician is or should reasonably be aware that the particular patient would be likely to attach significance to it.

For midwives, the Montgomery ruling transformed antenatal consultations. Midwives cannot rely on pre-printed consent forms or generic information leaflets. Consent is an ongoing, dialogic process. Clinicians must explore what matters to that specific woman, discuss benefits, material risks (including rare but devastating outcomes), alternative management strategies, and the implications of choosing no intervention.

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The Three Essential Pillars of Valid Consent

For consent to be legally and ethically valid, three elements must be satisfied simultaneously:

                  ┌──────────────────────────────────────────────┐
                  │       THE THREE PILLARS OF VALID CONSENT     │
                  └──────────────────────┬───────────────────────┘
                                         │
         ┌───────────────────────────────┼───────────────────────────────┐
         ▼                               ▼                               ▼
┌─────────────────┐             ┌─────────────────┐             ┌─────────────────┐
│   1. VOLUNTARY  │             │   2. INFORMED   │             │   3. CAPACITY   │
│                 │             │                 │             │                 │
│ • Free choice   │             │ • Material risk │             │ • MCA 2005      │
│ • No coercion   │             │ • Alternatives  │             │ • 2-stage test  │
│ • No institutional             • Doing nothing  │             │ • Presumption   │
│   pressure      │             │ • Dialogue      │             │   of capacity   │
└─────────────────┘             └─────────────────┘             └─────────────────┘

1. Voluntary: The decision must be made freely by the woman, free from duress, coercion, or undue influence from healthcare professionals, partners, or family members. Subtly pressuring a woman to accept an induction of labour or epidural violates voluntariness.
2. Informed: The woman must receive clear, unbiased, balanced information about the proposed intervention, its intended benefits, material risks, potential complications, available alternatives, and the natural history of taking no action.
3. Capacity: The woman must possess mental capacity to make that particular decision at the time it needs to be made.

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The Mental Capacity Act 2005

In England and Wales, decision-making capacity is governed by the Mental Capacity Act 2005 (MCA). (Scotland is governed by the Adults with Incapacity (Scotland) Act 2000; Northern Ireland by the Mental Capacity Act (NI) 2016).

The Five Statutory Principles (Section 1 MCA)

Every midwife must memorize and apply the five statutory principles of the MCA:

1. Presumption of Capacity: Every person is presumed to have capacity unless established otherwise. Capacity cannot be dismissed because of a person's age, appearance, or background.
2. Supported Decision-Making: A person is not to be treated as unable to make a decision unless all practicable steps to help them do so have been taken without success (e.g. communication aids, visual guides, involving advocates).
3. Unwise Decisions: A person is not to be treated as lacking capacity merely because they make an unwise decision. A competent adult has the legal right to make choices that healthcare professionals consider risky, irrational, or dangerous.
4. Best Interests: Any act done or decision made under the MCA for a person who lacks capacity must be done in their best interests (Section 4 checklist).
5. Least Restrictive Option: Any intervention undertaken for someone lacking capacity must be the option that is least restrictive of their basic rights and freedom of action.

The Two-Stage Functional Test of Capacity

When a midwife has reason to doubt a woman's capacity, the MCA's two-stage test must be applied:

• Stage 1 (Diagnostic Threshold): Does the person have an impairment of, or a disturbance in the functioning of, their mind or brain? (This may be temporary, such as extreme delirium, severe acute intoxication, or head trauma; or permanent, such as severe cognitive impairment).
• Stage 2 (Functional Assessment): Does that impairment cause the person to be unable to make the specific decision at the material time? Under Section 3(1), a person is unable to make a decision if they cannot:
  1. Understand the information relevant to the decision (including the consequences of deciding or not deciding);
  2. Retain that information long enough to make the decision;
  3. Weigh or use that information as part of the process of making the decision; and
  4. Communicate their decision (by speech, sign language, or any other means).

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Gillick Competence and Fraser Guidelines

In England and Wales, young people aged 16 and 17 are presumed by statute (Family Law Reform Act 1969, Section 8; in Scotland, the Age of Legal Capacity (Scotland) Act 1991 applies) to have capacity to consent to surgical, medical, or dental treatment.

For children under 16 years of age, legal capacity is governed by the landmark House of Lords case Gillick v West Norfolk & Wisbech Area Health Authority [1985]:

• Gillick Competence: A child under 16 has the legal capacity to consent to medical treatment, examination, or advice if they demonstrate sufficient intelligence, maturity, and understanding to comprehend fully what is proposed.
• Fraser Guidelines: Lord Fraser established five specific criteria permitting healthcare professionals to provide sexual and reproductive healthcare (such as contraception or pregnancy advice) to an under-16 without parental knowledge or consent:
  1. The young person understands the advice and implications;
  2. The professional cannot persuade the young person to inform their parents or allow the professional to inform them;
  3. The young person is very likely to begin or continue sexual activity with or without contraceptive treatment;
  4. Their physical or mental health is likely to suffer without the advice or treatment; and
  5. The young person's best interests require the provision of treatment without parental consent.

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Maternal Bodily Autonomy & The Legal Status of the Fetus

One of the most heavily tested legal principles in UK midwifery is the relationship between maternal rights and fetal interests.

The Legal Status of the Unborn Child

Under English common law, established in landmark rulings including St George's Healthcare NHS Trust v S [1998] 3 All ER 673 and Re MB (Caesarean Section) [1997]:

• An unborn fetus does not possess an independent legal personality or separate legal rights prior to birth.
• The fetus becomes a distinct legal person only upon being completely expelled from the mother's body and having established an independent circulation.
• A pregnant woman with mental capacity has an absolute legal right to refuse any medical treatment or intervention, even if that refusal leads to the death or permanent disability of the viable fetus, or her own death.

In St George's Healthcare NHS Trust v S [1998], a woman at 36 weeks' gestation with severe pre-eclampsia declined admission and induction, desiring a natural birth. She was detained under section 2 of the Mental Health Act 1983, and the hospital then obtained an ex parte High Court declaration authorising a caesarean section, which was performed against her will. The Court of Appeal ruled that the detention and the surgery were unlawful, reaffirming:

"Even when his or her own life depends on receiving medical treatment, an adult of sound mind is entitled to refuse it."

The court added that "while pregnancy increases the personal responsibilities of a woman it does not diminish her entitlement to decide whether or not to undergo medical treatment."

The Midwife's Role as Advocate

When a woman declines recommended interventions (such as continuous electronic fetal monitoring, induction for post-dates, blood transfusions, or caesarean section), the midwife's duty is not to coerce or abandon the woman. Under The Code:

• The midwife must act as the woman's advocate, ensuring her voice is respected across the multidisciplinary team;
• Provide non-judgmental, compassionate, individualized care;
• Facilitate balanced discussions using tools like the BRAIN model (Benefits, Risks, Alternatives, Intuition, Nothing/Next steps);
• Document discussions comprehensively and objectively;
• Collaborate with senior obstetricians and consultant midwives to create an individualized birth plan that maximizes safety while honouring the woman's informed decisions.