Rare diseases · Sign or symptom
Agonadism
HP:0008633
What it means
Absence of sex glands (gonads are the organs that produce gametes; testis in males and ovary in females).
Gonadal agenesis refers to the lack of development of gonads during fetal development; it may not be possible clinically to determine if gonal tissue was present at any point of development. For this reason, we regard agonadism and gonadal agenesis as synonymous.
Rare diseases that can present with this3
Very common80–99%
2The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Absent gonadal tissue · Gonadal agenesis
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.