Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

NLM Logo

5-alpha-Dihydroprogesterone MeSH Descriptor Data 2025


MeSH Heading
5-alpha-Dihydroprogesterone
Tree Number(s)
D04.210.500.745.558.075
D06.472.334.851.687.750.070
Unique ID
D043582
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D043582
Scope Note
A biologically active 5-alpha-reduced metabolite of plasma PROGESTERONE. It is the immediate precursor of 5-alpha-pregnan-3-alpha-ol-20-one (ALLOPREGNANOLONE), a neuroactive steroid that binds with GABA(A) RECEPTOR.
Entry Term(s)
3,20-Allopregnanedione
3,20-Allopregnanedione, (5alpha)-Isomer
3,20-Allopregnanedione, (5beta,13alpha,17alpha)-Isomer
5 alpha-Dihydroprogesterone
5 alpha-Pregnane-3,20-dione
5 beta-Pregnane-3,20-dione
5-alpha-Pregnane-3,20-dione
5-alpha-Pregnanedione
5-beta-Dihydroprogesterone
5alpha-DHP
5alpha-Pregnane-3,20-dione
5beta-DHP
Registry Numbers
98G4S1OH0Z
7350-00-7
51154-67-7
Related Numbers
51154-67-7
566-65-4
7350-00-7
Previous Indexing
Dihydroprogesterone (1976-2003)
Progesterone (1974-2003)
Public MeSH Note
2004; 3,20-ALLOPREGNANEDIONE was indexed under PREGNANEDIONES (NM) 1971-2003
History Note
2004; for 3,20-ALLOPREGNANEDIONE use PREGNANEDIONES (NM) 1971-2003
Date Established
2004/01/01
Date of Entry
2003/07/09
Revision Date
2016/05/27
5-alpha-Dihydroprogesterone Preferred
5-beta-Dihydroprogesterone Related
3,20-Allopregnanedione, (5beta,13alpha,17alpha)-Isomer Related
page delivered in 0.144s