Born alive rule
The "born alive" rule is a common law legal principle that holds that various criminal laws, such as homicide and assault, apply only to a child that is "born alive". U.S. courts have overturned this rule, citing recent advances in science and medicine; and in several states, feticide statutes have been explicitly framed or amended to include fetuses in utero. Abortion in Canada is still governed by the born alive rule, as courts continue to hold to its foundational principles. In 1996 the Law Lords confirmed the rule applied in English law but that alternative charges existed in lieu, such as a charge of unlawful or negligent manslaughter instead of murder.
The born alive rule was originally a principle at common law in England that was carried to the United States and other former colonies of the British Empire. First formulated by William Staunford, it was later set down by Edward Coke in his Institutes of the Laws of England. It follows the language used for cases of murder in English law, identifying three salient characteristics.
- "If a woman be quick with childe, and by a potion or otherwise killeth it in her wombe, or if a man beat her, whereby the child dyeth in her body, and she is delivered of a dead childe, this is great misprision, and no murder; but if he childe be born alive and dyeth of the potion, battery, or other cause, this is murder; for in law it is accounted a reasonable creature, in rerum natura, when it is born alive.
The term "reasonable creature" echoes the language of an influential strand Catholic doctrine on the nature of the soul and the Beginning of human personhood which generally adopted Aristotle in holding that it is the "rational soul" that infuses the fetus with "human beingness". There was disagreement as to whether this occurred at the moment of conception, or at the moment of quickening, as Aristotle had held. As for rerum natura, William Staunford had explained "the thing killed must be in part of the world of physical beings (in rerum natura). This has been interpreted as meaning completely expelled from the womb. Finally, the "thing killed" must be in the King's peace, i.e. in a situation where the protection of the King's peace applied. An outlaw, for instance, was not in the King's peace, and not subject to protection of the law.
The designation "misprision, and no murder", can be traced to the "Leges Henrici Primi" of 1115, which designated abortion "quasi homicide". Here, we find the penalties for abortion were varying lengths of penance, indicating it was dealt with by ecclesiastical courts, while homicide, being a breach of the King's peace, was dealt with in secular courts. Penalties for abortion varied depending on whether the fetus was formed or unformed, that is before or after quickening, and were only imposed on women who had aborted the product of "fornication" (illicit sex), a distinction previously made by the Venerable Bede.
The personhood status of the fetus once born is a matter of speculation, as children had little recognition at law prior to the Offences against the Person Act 1828, and today are still not considered full persons until they reach the age of majority and are deemed capable of entering into legally binding contracts. As the Eliza Armstrong case shows, however, it was still legal for a father to sell his child as late as 1885, long after the slave trade had been abolished in England.
In the nineteenth century, some began to argue for legal recognition of the moment of conception as the beginning of a human being, basing their argument on growing awareness of the processes of pregnancy and fetal development. They succeeded in drafting laws which criminalized abortion in all forms and made it punishable in secular courts.
Current state of the law
Advances in the state of the art in medical science, including medical knowledge related to the viability of the fetus, and the ease with which the fetus can be observed in the womb as a living being, treated clinically as a human being, and (by certain stages) demonstrate neural and other processes considered as human, have led a number of jurisdictions – in particular in the United States – to supplant or abolish this common law principle.
Examples of the evidence cited can be found within studies in ultrasonography, fetal heart monitoring, fetoscopy, and behavioral neuroscience. Studies in Neonatal perception suggest that the physiology required for consciousness does not exist prior to the 28th week, as this is when the thalamic afferents begin to enter the cerebral cortex. How long it takes for the requisite connection to be properly established is unknown at this time. Additionally, it is unclear whether the presence of certain hormones may keep the fetal brain sedated until birth. 
The rule forms the foundation of UK law related to the fetus.
In the case Attorney General's Reference No. 3 of 1994 Lord Mustill noted that the legal position of the unborn, and other pertinent rules related to transferred malice, were very strongly embedded in the structure of the law and had been considered relatively recently by the courts. The Law Lords concurred that a fetus, although protected by the law in a number of ways, is legally not a separate person from its mother in English law. They described this as outdated and misconceived but legally established as a principle, adding that the fetus might be or not be a person for legal purposes, but could not in modern times be described as a part of its mother. The concept of transferred malice and general malice were also not without difficulties; these are the legal principles that say when a person engages in an unlawful act, they are responsible for its consequences, including (a) harm to others unintended to be harmed, and (b) types of harm they did not intend. For example, the concept of transferred malice was applied where an assault caused a child to die not because it injured the child, but because it caused the child’s premature birth.  It was also applied where manslaughter through a midwife’s gross negligence caused a child to die before its complete birth. 
As such in Attorney General's Reference No. 3 of 1994 where a husband stabbed his pregnant wife, causing premature birth, and the baby died due to that premature birth, in English law no murder took place. "Until she had been born alive and acquired a separate existence she could not be the victim of homicide". The requirement for murder under English law, involving transfer of malice to a fetus, and then (notionally) from a fetus to the born child with legal personality, who died as a child at a later time despite never having suffered harm as a child with legal personality, nor even as a fetus having suffered any fatal wound (the injury sustained as a fetus was not a contributory cause), nor having malice deliberately directed at it, was described as legally "too far" to support a murder charge.
However they did note that English law allowed for alternative remedies in some cases, specifically those based on "unlawful act" and "gross negligence" manslaughter and other offenses which do not require intent to harm the victim (manslaughter in English law is capable of a sentence up to and including life imprisonment):
- "Lord Hope has, however, ... [directed]... attention to the foreseeability on the part of the accused that his act would create a risk ... All that it [sic] is needed, once causation is established, is an act creating a risk to anyone; and such a risk is obviously established in the case of any violent assault ... The unlawful and dangerous act of B changed the maternal environment of the foetus in such a way that when born the child died when she would otherwise have lived. The requirements of causation and death were thus satisfied, and the four attributes of "unlawful act" manslaughter were complete."
In the same ruling, Lord Hope drew attention to the parallel case of Regina v. Mitchell ( Q.B. 741) where a blow aimed at one person caused another to suffer harm leading to later death, and summarized the legal position of the 1994 case:
- "The intention which must be discovered is an intention to do an act which is unlawful and dangerous ... irrespective of who was the ultimate victim of it. The fact that the child whom the mother was carrying at the time was born alive and then died as a result of the stabbing is all that was needed for the offence of manslaughter when actus reus for that crime was completed by the child's death. The question, once all the other elements are satisfied, is simply one of causation. The defendant must accept all the consequences of his act, so long as the jury are satisfied that he did what he did intentionally, that what he did was unlawful and that, applying the correct test, it was also dangerous. The death of the child was unintentional, but the nature and quality of the act which caused it was such that it was criminal and therefore punishable. In my opinion that is sufficient for the offence of manslaughter. There is no need to look to the doctrine of transferred malice..."
In other cases where the fetus has not achieved independent existence, an act causing harm to an unborn child may be treated legally as harm to the mother herself. For example, in the case St George's Healthcare NHS Trust v S; R v Collins & Ors, ex parte S it was held a trespass to the person when a hospital terminated a pregnancy involuntarily because the mother was diagnosed with severe pre-eclampsia. The court held that an unborn child's need for medical assistance does not prevail over the mother's autonomy and she is entitled to refuse consent to treatment, whether her own life or that of her unborn child depends on it.
As of 2002, 23 states in the United States still employed the rule, to lesser or greater extent. The abolition of the rule has proceeded piecemeal, from case to case and from statute to statute, rather than wholesale. One such landmark case with respect to the rule was Commonwealth vs. Cass, in the Commonwealth of Massachusetts, where the court held that the stillbirth of an eight-month-old fetus, whose mother had been injured by a motorist, constituted vehicular homicide. By a majority decision, the Supreme Court of Massachusetts held that a viable fetus constituted a "person" for the purposes of vehicular homicide law. In the opinion of the justices,
|“||We think that the better rule is that infliction of perinatal injuries resulting in the death of a viable fetus, before or after it is born, is homicide.||”|
Several courts have held that it is not their function to revise statute law by abolishing the born alive rule, and have stated that such changes in the law should come from the legislature. In 1970 in Keeler v. Superior Court of Amador County, the California Supreme Court dismissed a murder indictment against a man who had caused the stillbirth of the child of his estranged pregnant wife, stating that,
|“||[T]he courts cannot go so far as to create an offense by enlarging a statute, by inserting or deleting words, or by giving the terms used false or unusual meanings [...] Whether to extend liability for murder in California is a determination solely within the province of the Legislature.||”|
Several legislatures have, as a consequence, revised their statutes to explicitly include deaths and injuries to fetuses in utero. The general policy has been that an attacker who causes the stillbirth of a fetus should be punished for the destruction of that fetus in the same way as an attacker who attacks a person and causes their death. Some legislatures have simply expanded their existing offences to explicitly include fetuses in utero. Others have created wholly new, and separate, offences.
- Emma Cave (2004). The Mother of All Crimes: Human Rights, Criminalization and the Child Born Alive. Ashgate Publishing, Ltd. pp. 43, 48. ISBN 0-7546-2366-1.
- Kerr, Ian R. (2000). "Pregnant Women and the "Born Alive" Rule in Canada". Tort Law Review 8: 713–719. SSRN 902453.
- Gerard Casey (May 2005). Born Alive: The Legal Status of the Unborn Child in England and the U. S. A. Barry Rose Law Publishers Limited. ISBN 1-902681-46-0.
- Ranson D. (February 2006). "The "born alive" rule". J Law Med 13 (3): 285–288. PMID 16506720.
- Massachusetts. Supreme Judicial Court, Barnstable. (August 1984). "Commonwealth v. Cass.". North East Rep Second Ser. 16 (467): 1324–1330. PMID 12041184.
- Attorney General's Reference No 3 of 1994 Attorney General's Reference No 3 of 1994  UKHL 31,  1 Cr App Rep 91,  3 All ER 936,  3 WLR 421,  Crim LR 829,  AC 245 (24 July 1997), House of Lords
- Murder , definition found at Law Teacher
- Cited in “The New “Fetal Protection”: The Wrong Answer to the Crisis of Inadequate Health Care for Women and Children”, Linda Fentiman, 2006, note 119, (abstract and download link)
-  On the Generation of Animals, book II
-  Bouvier's Law Dictionary, Murder
- Abortion - Abortion In English Law
- Spivack, Carla, To Bring Down the Flowers: The Cultural Context of Abortion Law in Early Modern England. Available at SSRN: 
- Sheena Meredith (2005). Policing Pregnancy: The Law And Ethics of Obstetric Conflict. Ashgate Publishing, Ltd. p. 182. ISBN 0-7546-4412-X.
- William M. Connolly (2002). One Life: How the U.S. Supreme Court Deliberately Distorted the History, Science and Law of Abortion. Xlibris Corporation. ISBN 1-4010-3786-0.
- Mellor DJ, Diesch TJ, Gunn AJ, Bennet L. "The importance of 'awareness' for understanding fetal pain.". Brain Research Reviews, 49(3), 455-71. (2005). Retrieved 12 March 2012.
- R v West (1848) 175 ER 329
- R v Senior (1832) 1 Mood CC 346
-  3 All ER
- John (John A.) Seymour (2000). Childbirth and the Law. Oxford University Press. pp. 140–143. ISBN 0-19-826468-2.
- David C. Brody, James R. Acker, Wayne A. Logan (2001). "Criminal Homicide". Criminal Law. Jones and Bartlett. p. 411. ISBN 0-8342-1083-5.