Baby X, Re

In care proceedings involving unexplained infant collapse, recurrence of unexplained events does not itself justify an inference of deliberate harm. The court must identify secondary facts capable of supporting an inference on the balance of probabilities. Medical uncertainty remains uncertainty, even where natural and unnatural causes are both possible. The court must approach conflicting expert evidence with particular caution. Where the evidence establishes prolonged cessation of breathing and excludes known medical causes, the court may infer intentional upper-airway obstruction from the combined medical, factual and credibility evidence.

The local authority brought care proceedings concerning Baby X, who suffered an apparent life-threatening event followed by a severe cardio-respiratory collapse and neurological injury. The central issues were the cause of each event and whether the mother had deliberately caused the later collapse by interfering with the apnoea alarm and smothering the child.

The mother relied on natural, unexplained medical mechanisms. The court considered extensive factual and expert evidence before determining the allegations and whether the statutory threshold was established.

1. First event. The admission on 1 August 2008 was found to be a natural but unexplained apparent life-threatening event. The evidence of the mother and her friend was accepted on the material factual issues.
2. Recurrence and medical uncertainty. Recurrence alone was not probative. Any inference of causation had to be based on facts found, including secondary facts capable of supporting the inference. The court adopted the caution identified in Re U (Serious Injury: Standard of Proof) Re B [2004] 2 FLR 263: unexplained injury or collapse remains equivocal; particular caution is required where experts disagree; and the court must guard against over-dogmatic or scientifically prejudiced evidence.
3. Medical evidence. Known neurological, metabolic, infectious, immunological, genetic and cardiac causes were excluded. The evidence established that Baby X had not been breathing for at least two or three minutes, and probably five minutes or more. The blood gases, physical presentation and brain injury were consistent with prolonged airway obstruction.
4. Natural hypotheses. The general possibility of an unknown natural mechanism remained reasonable. The specific transient-bacteraemia hypothesis, however, lacked evidential support and could not be applied to the facts. The court therefore remained with two broad possibilities: natural but unexplained cause, or unnatural cause.
5. Factual inference. The apnoea alarm was working and had been activated only seconds before medical assistance was summoned. The mother’s account was unreliable on the critical events. The court inferred that she had switched off and later reactivated the alarm to avoid detection while causing the collapse. The most likely mechanism was intentional upper-airway obstruction by smothering.
6. Threshold and further directions. The findings satisfied section 31 of the 1989 Act. Welfare questions were adjourned for further assessment and directions. The court did not find that the mother intended to kill Baby X.