Hitler's DNA reveals he had a syndrome that affects genitals

Question

According to a new documentary: Hitler's DNA: Blueprint Of A Dictator, researchers have recently analyzed a sample of DNA believed to be Adolf Hitlers. The research, which took more than 4 years, was based on the DNA from a blood-covered piece of cloth taken from a couch in the bunker of where Hitler died. They tested the DNA and sequenced Hitler's genome and were able to confirm the DNA, specifically the Y-chromosome by comparing it to the blood of a confirmed male relative. This sample revealed a mutation in the gene, PROK2, which is a variant that causes Kallmann syndrome. This syndrome affects the development of sexual organs with typical symptoms including low testosterone, abnormal genital development and a lack of a sense of smell. This research is backed up by another finding of a medical document from Hitler's stay in prison in 1923 which suggested he had a condition in which a testicle fails to descend. These findings have helped answer historical questions as to why Hitler failed to have children in spite of his belief that Germans should have large families, and why he was notoriously guarded about his private life and medical records.

Answer 1

This headline is exaggerated but the article itself is true. It is important to note that this article does not state that Hitler did have Kellmann Syndrome, but that the results of the test on his blood resulted in evidence showing a high probability of it, due to an important deletion of the PROK2 letter in his genetics. Kellmann syndrome itself primarily causes an inhibition to the course of puberty (The Guardian). The high probability of Hitler having Kellmann syndrome is not 100%, so it is impossible to say he had it in actuality. The title explicitly states that Hitler did have Kellmann Syndrome which is highly probably but not totally true.

Answer 2

The statement that Hitler had Kallmann syndrome is true--or at least, there is a very high likelihood that he had the syndrome based on his DNA. According to this user's linked article by CBS, scientists tested a bit of Hitler's blood from the cloth of the sofa he shot himself on. The rare genetic condition, Kallmann Syndrome, is the result of the deletion of a letter from gene PROK2, and often manifests in men in the form of low or fluctuating testosterone levels and abnormal genital growth. It prevents kids from starting or fully completing puberty. An article by The Guardian, "Did Hitler really have a 'micropenis'? The dubious documentary analyzing the dictator's DNA," has a title that's meant to be eye-catching and possibly exaggerated, but the piece ultimately provides insightful information on who did the research and how. It provides evidence that reliable researchers from the two-part documentary Hitler's DNA: Blueprint of a Dictator teamed up with Turi King, a scientist who raised the bar for performing genetic analyses in an ethical, accessible way, and Alex Kay, a historian who specializes in Nazi Germany. Their finding that supports the fact that Hitler had the rare genetic condition aligns with medical records from the Landsberg prison at which Hitler stayed briefly in 1923. According to the records, the examining doctor found Hitler had an undescended right testicle. 

https://www.theguardian.com/tv-and-radio/2025/nov/13/did-hitler-really-have-a-micropenis-hitlers-dna-channel-4-documentary 

https://www.cbsnews.com/news/adolf-hitler-dna-reveals-nazi-likely-kallmann-syndrome-genitals-micropenis/