Daubert Just Killed Another Birth-Injury Case — Here's the Pattern (Scottoline v. Women First)

By John Mahoney · Founder, MedLegal AI · May 2, 2026

In June 2025, the Delaware Supreme Court affirmed summary judgment against the Scottoline plaintiffs after excluding their pediatric neurologist's causation opinion. The expert was qualified to diagnose hypoxic-ischemic encephalopathy. He was qualified to diagnose autism spectrum disorder. He was not, the court held, qualified to opine that the first caused the second — at least not with the workup he had done. That distinction is now the leading Delaware authority on physician-causation testimony, and 2026 motion practice in other jurisdictions is already citing the diagnosis-vs-etiology framework approvingly.

If you handle birth-injury cases as a plaintiff attorney, Scottoline is the case you cannot afford to misread.

What Happened in Scottoline v. Women First

The plaintiffs alleged that the defendants' negligence at delivery caused their child to suffer HIE, which in turn caused the child's later diagnoses of autism spectrum disorder and developmental delays. The plaintiffs retained a board-certified pediatric neurologist as their causation expert. The defense moved to exclude the etiology opinion.

The trial court excluded the expert. The Delaware Supreme Court affirmed.

The Court drew a careful line. Diagnosing what a patient has — HIE here, ASD there — is one inquiry. Opining on what caused the patient's condition is a different inquiry, and it is the one the plaintiff has to win to get past Daubert.

On the etiology question, the Court found three problems with the expert's workup:

1. The peer-reviewed literature he cited established correlation between HIE and ASD — not causation. That is a fundamental gap, and the expert did not bridge it.
2. His differential-etiology analysis did not address maternal history, genetic testing, metabolic workup, or other independent causes of neurodevelopmental disorders. For ASD specifically, the universe of recognized causes is large, genuinely heterogeneous, and well-documented in the literature. Skipping any of them is conspicuous.
3. The Court rejected the argument that an experienced clinician's "I have seen this pattern" judgment should get extra deference at the gatekeeping stage. Daubert rigor applies regardless of credentials.

With the expert excluded, summary judgment was the inevitable next step.

Why It Matters for Plaintiff Attorneys

Scottoline crystallizes a trend that has been building since the December 2023 amendment to Federal Rule of Evidence 702. Courts are now openly hostile to a particular kind of expert testimony: the experienced physician who diagnoses the patient, identifies a clinically plausible mechanism, and stops there. That used to be enough in many jurisdictions. After 2023 and after Scottoline, it is not.

For birth-injury cases specifically, the consequences are sharp:

• HIE-causes-autism is no longer a viable causation theory without much more rigorous etiology work than most reports currently include. The peer-reviewed literature on HIE and ASD is, at best, correlational. If your expert's report rests on a correlation, the Daubert motion is going to land.
• Differential etiology requires explicit rule-out, not implicit consideration. It is not enough for the expert to say "I considered other causes." The report has to walk through each genuinely independent cause of the child's diagnoses and explain — with reference to the actual medical record — why each one was ruled out.
• Clinical experience is no longer a Daubert shortcut. The Delaware Supreme Court was explicit on this. The thirty-year-treating-physician argument does not move the gatekeeping needle.

The doctrinal pattern is even broader. In the unreported Maryland Bayview/Hopkins decision in 2025, the Maryland Appellate Court excluded both plaintiff causation experts in a 30-week premature birth/cerebral palsy case for a parallel reason: they had not addressed prematurity itself as the alternative cause, even though prematurity alone substantially elevates the cerebral-palsy baseline rate. In a separate 2024 Maryland brachial-plexus case, both experts were excluded because they pivoted between deposition and the Daubert hearing on whether maternal forces could cause the injury. Different cases, different specialties, same underlying problem: the etiology workup did not survive scrutiny.

If you are a plaintiff firm that handles birth-injury cases, you should treat Scottoline less as a one-off Delaware decision and more as a template defense motion. The defense bar already is.

How to Avoid This in Your Next Case

Three concrete steps to harden your birth-injury Daubert posture before the next motion:

1. Build the etiology stack before the expert writes the report. Most expert reports get drafted from the medical record forward — the expert reads the chart, forms an opinion, and writes. Flip it. Start with the peer-reviewed literature on the precise causation question (e.g., HIE causes ASD, perinatal asphyxia causes CP, kernicterus causes specific motor deficits) and assemble a literature stack that establishes — or fails to establish — a causal link rather than a correlation. If the literature only supports correlation, that has to be addressed head-on in the report, not hidden.

2. Require an explicit alternative-cause matrix. For each genuinely independent cause of the child's diagnoses, the report should state: (a) what the alternative cause is, (b) what evidence in the medical record bears on it, (c) what the expert did to rule it in or out, and (d) the conclusion. For ASD that means at minimum: genetic, metabolic, infectious, environmental, and prematurity-related causes. For CP that means at minimum: prematurity, intrauterine infection, maternal pre-eclampsia, placental abruption, and genetic syndromes. The matrix is the report's spine. If a defense Daubert motion can point to a row that is missing, the motion has a good shot.

3. Distinguish diagnosis from etiology in the report's own structure. Two separate sections. First section: "Diagnosis." Second section: "Etiology." This is not cosmetic — it forces the expert to articulate which sources, which records, and which reasoning support each conclusion. When the defense motion arrives, the gatekeeping inquiry the court runs is the same one your report's structure already anticipated.

A fourth, broader point: the credentials-as-shortcut era is over. If the expert's specialty is more than one degree of separation from the precise causation question, you have a specialty-mismatch exposure separate from the etiology gaps. The 2025 New Jersey MILD spinal-procedure case excluded a Tufts pain-management director — extraordinarily credentialed — because he twice said in deposition that he would defer to a neurologist on the cause of the patient's leg pain, and then opined anyway. The cure for specialty mismatch is co-experting, not credential-stacking.

How a Daubert Workup Tool Can Help

For birth-injury cases specifically, MedLegal AI's Daubert workup tool ships a pre-loaded HIE-vs-other-causes alternative-cause matrix that mirrors the analytical structure the Delaware Supreme Court would have credited. The tool auto-generates the etiology literature stack at intake, flags any alternative cause that hasn't been addressed in the draft report, and runs a specialty-fit audit against the precise causation question. It also surfaces specialty-mismatch language ("I would defer to a neurologist") in the expert's prior deposition record before that language gets memorialized in this case's transcript. The point is to prepare smarter for Daubert challenges — to surface the gaps your expert's report has before the defense does. You can run a free Daubert workup on your expert here.

Bottom Line

Scottoline is not an outlier. It is the doctrinal model the defense bar is now using to attack birth-injury causation experts in every Daubert jurisdiction. The plaintiff-side fix is structural: separate diagnosis from etiology in the report, build the alternative-cause matrix from the literature forward, and stop relying on clinical experience as a substitute for rigorous workup. The cases that survive Daubert in 2026 will be the ones whose reports were built that way from the start.

Run a free Daubert workup on your expert.

MedLegal AI is software, not a law firm. We do not provide legal advice. All AI-generated outputs require independent review by a licensed attorney.

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