Transsexualism clinical trials

The registry lists 54 studies for Transsexualism across more than 10 countries. 18 are recruiting or about to start. 29 of them are mainly about Transsexualism (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-09.

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Status

Completed: 23
Recruiting: 13
Status unknown: 7
Not yet recruiting: 4
Terminated: 4
Active, not recruiting: 2

Phase

Phase 4: 4
Phase 3: 2
Early Phase 1: 1
Phase 2: 1

Where

United States: 17
Belgium: 6
France: 5
Germany: 4
Austria: 4
Denmark: 3

Who runs them

University Hospital, Ghent (4) · Central Hospital, Nancy, France (4) · University of Colorado, Denver (3) · St. Louis University (2) · Medical College of Wisconsin (2) · Unita Complessa di Ostetricia e Ginecologia (2) · University Ghent (2) · Universitätsklinikum Hamburg-Eppendorf (2)

What is being tested here

Drugs under test in Transsexualism studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

Drug	Phase 3	All
Estradiol	0	3
Testosterone	0	3
Testosterone 17 beta-cypionate	0	2
Dutasteride	1	1
Testosterone undecanoate	0	1
Cyproterone Acetate	0	1
Cyproterone	0	1

Drug classes tested here Androgens 3

Who these studies take

Of the 13 Transsexualism studies recruiting now, 8 (62%) set no upper age limit and 5 (38%) stop at 75 or younger. 2 (15%) take children under 18. 5 (38%) are for women only and 3 (23%) for men only; 7 (54%) take healthy volunteers.

Recruiting studies that take each age, of 13
Age	Women	Men
10	0 (0%)	1 (8%)
18	9 (69%)	6 (46%)
30	9 (69%)	6 (46%)
40	8 (62%)	6 (46%)
50	8 (62%)	6 (46%)
65	7 (54%)	5 (38%)
75	6 (46%)	4 (31%)
85	6 (46%)	4 (31%)

Across all 54 studies, recruiting or not: 43% stop at 75 or younger and 35% at 65; 15% take children; 35% are for women only and 13% for men only; 56% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Transsexualism studies take

Of 14 interventional studies with no phase under Transsexualism, half reached primary completion within 24 months of starting, counting those still running.

Start to primary completion	Every sponsor	Industry	Non-industry
Interventional, no phase	24 mo5–36 · 14 studies	—	—

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

Studies

Recruiting first, then most recently updated. Showing 50 of 54. Browse all 54 → or search them.