Clinical overview
Informed consent is not a signature on a form — it is a process of shared decision-making, and in obstetrics and gynaecology it is one of the most ethically and legally exposed areas of all of medicine. We operate on the reproductive organs, deliver babies in emergencies where the clock is the enemy, terminate pregnancies, sterilise, and treat two patients at once (mother and fetus) whose interests can appear to diverge. Almost every high-value medico-legal claim against South African obstetricians turns, somewhere in the file, on consent: was the woman told about the alternative to the caesarean, was she counselled about the risk of shoulder dystocia in a macrosomic vaginal birth, did she understand that a hysterectomy at the time of myomectomy was a possibility, was the sterilisation truly voluntary.
As a registrar you will be asked to take consent dozens of times a week, often quickly, often in a second language to the patient, sometimes in the resus room. The exam — and the law — expects you to understand that valid consent has structural requirements that do not bend just because you are busy. This chapter frames the issues: what makes consent valid, where it is hardest in O&G, who can consent for whom, and how South African statute and the HPCSA shape every one of these conversations. The skill being tested is judgement — recognising the consent problem in a clinical vignette and reasoning to a defensible answer — not reciting a definition. Consent runs through almost every other objective you will study; treat it as a lens, not a topic.
Core knowledge
The three elements of valid consent
Figure H1.1 — Valid consent as a documented conversation: capacity, information, voluntariness, specific authority, material-risk disclosure, and the National Health Act duties.
Standard teaching holds that consent is valid only when three conditions are simultaneously met. These are worth knowing as a checklist because vignettes are built by removing one of them.
- Capacity (competence). The patient must be able to understand the information, retain it, weigh it in arriving at a decision, and communicate that decision. Capacity is decision-specific and time-specific — a woman in established labour with severe pain, or one who is hypovolaemic and confused from haemorrhage, may lack capacity for a complex decision she had at booking.
- Information. The patient must be given adequate information about the diagnosis, the proposed intervention, its material risks and benefits, the reasonable alternatives (including doing nothing), and the consequences of refusal.
- Voluntariness. The decision must be free of coercion, undue influence or manipulation — from clinicians, family, or the institution. This element is the crux of sterilisation and termination consent.
To these three, South African law adds a fourth, threshold requirement: the patient must know and understand the nature and effect of what she is consenting to, and must consent to the specific intervention. Consent obtained for one procedure does not authorise a different one.
The legal architecture in South Africa
The foundational statute is the National Health Act 61 of 2003. Section 6 obliges the provider to inform the user of her health status, the range of diagnostic and treatment options, the benefits, risks, costs and consequences of each, and her right to refuse — and to do so in a language the user understands and at a level appropriate to her literacy. Section 7 prohibits provision of health services without informed consent, with narrow exceptions (statutory authorisation, court order, or where failure to treat would result in a serious risk to public health, or where the user is unable to give consent and an authorised person is unavailable in an emergency). Section 8 entrenches participation in decisions about one's own health. The HPCSA elaborates these duties in its guidelines on Seeking Patients' Informed Consent: The Ethical Considerations and its booklets on the standard professional ethical rules — these are the documents the Council will measure you against at a disciplinary inquiry.
Two further Acts dominate O&G consent and are dealt with in SA O&G law:
- The Choice on Termination of Pregnancy Act 92 of 1996 (amended 2008) makes the request for termination the woman's own; below the relevant gestational thresholds a competent woman consents for herself, and a minor is to be advised to consult her parents but cannot be compelled to, and may consent herself.
- The Children's Act 38 of 2005 sets the framework for consent by and for minors (below).
Material risk and the standard of disclosure
Whose yardstick decides which risks must be disclosed? The historical "professional standard" (what a reasonable body of doctors would disclose) has been displaced internationally by a patient-centred (prudent-patient) standard: a risk is material, and must be disclosed, if a reasonable person in the patient's position would attach significance to it, or if this particular doctor is or should be aware that this particular patient would attach significance to it. South African case law (the line running through Castell v De Greef) established that the doctor has a duty to warn of material risks, judged from the patient's perspective, and that consent is a defence to what would otherwise be an assault only if it is properly informed. The practical consequence in O&G: a 0.2–0.5% risk of uterine rupture in VBAC, or the risk of obstetric anal sphincter injury with an instrumental birth, is material to a woman choosing her mode of delivery even though it is numerically small, because a reasonable woman would want to weigh it.