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Two families shaken by San Raffaele embryo mix-up on July 23

Two families shaken by San Raffaele embryo mix-up on July 23

A biologist at San Raffaele's Embryology lab read the wrong program line on July 23, causing one couple's embryo to be transferred into another patient…

Two couples — both under 35, both on their first attempt at assisted reproduction — left the San Raffaele hospital's Embryology laboratory on July 23 with a situation neither had prepared for: the wrong embryo had been transferred. Enrico Papaleo, head of the hospital's Medically Assisted Reproduction Center, acknowledged the error publicly in an interview with Corriere della Sera, describing it as a human mistake occurring once in every 26,000 transfers. The laboratory was suspended by the ATS for at least 15 days following the incident. 🔹 What happened: According to Papaleo, two transfers were scheduled that day. Two biologists — one performing, one witnessing — prepared embryo plates while the patient was being identified in the pre-admission room. One biologist read the wrong line of the program and extracted the material for patient B instead of patient A. The second biologist then confirmed the plates belonged to B, which they did. The error, Papaleo said, began with that first misread. The double-verification system confirmed the wrong starting point rather than catching it. 🔹 Why it matters: The two couples at the center of this incident were at one of the most emotionally and physically demanding moments a family can face. One still has her embryo; the other must restart the process the following month — a delay that carries its own medical and emotional weight. Papaleo said both biologists are «very shaken» and that he does not plan to remove them from the team. The ATS suspension affects not just this case but all patients whose procedures are paused during the at-least-15-day window. 📌 EPM Take: The couple who must restart next month will carry the weight of this error in a way that no institutional statement addresses. Papaleo's one-in-26,000 statistic describes a system's average; it says nothing about the specific cost absorbed by the two families who landed inside that fraction. What is absent from the public conversation is a direct account of what support — procedural, emotional, or otherwise — the hospital offered those couples beyond the information that one retains her embryo and the other restarts soon. The 15-day ATS suspension creates the conditions for a protocol review, but the question those families deserve answered is whether the parallel identification-and-preparation sequence will change before the lab reopens.
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