While the term you mentioned is sometimes linked to sensationalized or non-scientific content, recent reports have highlighted specific areas of intersection between gender-related science and animal testing:

The process of changing one's gender presentation and/or physical characteristics to align with their internal identity, which may include social, legal, or medical changes. Respectful Communication & Allyship

: This rare condition occurs when an animal is split down the middle—one side is genetically and physically male, and the other is female. :