## Facts

- In 1965, Mennonite Hospital twice transfused 13-year-old Emma Renslow, who had Rh-negative blood, with Rh-positive blood.
- Emma allegedly suffered Rh sensitization from the incompatible transfusions, but had no immediate reaction and was not told of the error or sensitization.
- Defendants allegedly knew of the transfusion error but did not notify Emma or her family.
- Emma first learned of her Rh sensitization in December 1973 during prenatal blood screening.
- Emma later conceived Leah Ann Renslow; the sensitization allegedly caused prenatal injury, necessitating induced premature birth.
- Leah was born in March 1974 jaundiced, with hyperbilirubinemia, and required exchange transfusions.
- Emma, individually and on Leah’s behalf, sued the hospital and its laboratory director for negligence and willful and wanton misconduct, seeking damages for severe and permanent injuries allegedly caused by prenatal harm.

## Issues

1. Whether a child not conceived when negligent acts were committed against the mother has a cause of action for injuries sustained in utero that result from those earlier acts.

## Decision

- The Illinois Supreme Court held that a later-conceived child may sue for in utero injuries that are the reasonably foreseeable result of negligent acts committed against the mother before conception.
- The court affirmed the appellate court’s reversal of the dismissal of Leah’s claims and remanded for further proceedings.

## Legal Principles

- A duty of care may extend to a child conceived after the defendant’s negligent conduct when the child’s prenatal injuries are a foreseeable consequence of that conduct directed at the mother.
- A child has a legally cognizable interest in being born free from prenatal injuries foreseeably caused by a breach of duty to the mother.
- The time of conception (and related temporal markers such as viability) is not an absolute bar to duty or liability in prenatal-injury cases; duty turns on foreseeability, policy, and the parties’ relationship.
- Where medical knowledge makes long-term reproductive risks foreseeable (such as Rh sensitization from incompatible blood transfusion), policy may support recognizing liability for medically direct, temporally delayed causal chains.

## Conclusion

Illinois permitted a child’s negligence action for prenatal injuries traced to a preconception negligent transfusion of the mother, reasoning that foreseeability and duty can extend to later-conceived children when medical science makes the risk to future pregnancies predictable.


Renslow v. Mennonite Hosp., 67 Ill. 2d 348, 367 N.E.2d 1250 (Ill. 1977)