This report explores the key academic and clinical contributions of Dr. Milton Diamond to the fields of sexology and gender identity, with a focus on his influential work on the biological basis of sexual identity and the "John/Joan" case.
The most famous application of Diamond’s theories was his follow-up on the case of David Reimer .
: This case significantly altered the medical standard of care, leading to a shift away from immediate, non-consensual surgeries on infants with ambiguous genitalia . Key Concepts in Diamond's Research
: In 1997, Dr. Diamond published a long-term review revealing that Reimer never accepted his female upbringing. Despite intensive social conditioning, Reimer experienced severe gender dysphoria, eventually discovering the truth and transitioning back to living as a male in his teens.
: After a botched circumcision in 1966 left Bruce (David) Reimer without a penis, psychologist John Money recommended the child be raised as a girl (named "Joan") to prove that gender is a learned social construct.

