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Oligospermia clinical trials

The registry lists 64 studies for Oligospermia across more than 10 countries. 17 are recruiting or about to start. 43 of them are mainly about Oligospermia (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-06.

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Status

Completed
31
Recruiting
13
Status unknown
11
Terminated
3
Not yet recruiting
3
Active, not recruiting
1

Phase

Phase 2
9
Phase 4
6
Phase 3
5
Phase 1
4
Early Phase 1
2

Where

China
9
United States
7
Egypt
6
Spain
5
Israel
4
Indonesia
3

Who runs them

Staidson (Beijing) Biopharmaceuticals Co., Ltd (3) · Mst.Sumyara Khatun (2) · Clinique Ovo (2) · Reproductive & Genetic Hospital of CITIC-Xiangya (2) · National Cheng-Kung University Hospital (1) · Ankara City Hospital Bilkent (1) · University of California, Los Angeles (1) · Herbarium Laboratorio Botanico Ltda (1)

What is being tested here

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

DrugOpenPhase 3All
Carnitine112
STSP-0902102
Isotretinoin101
Clomiphene101
Follicle Stimulating Hormone101
Tribulus extract101
Coenzyme Q10101
Letrozole022
Geritol001
BCG Vaccine001

Drug classes tested here Aromatase inhibitors 3

Coming up

0phase 3 studies under way
6studies finish main data collection within a year

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

All 6

Who these studies take

Of the 13 Oligospermia studies recruiting now, 4 (31%) set no upper age limit and 8 (62%) stop at 75 or younger. 2 (15%) take children under 18. 0 (0%) are for women only and 10 (77%) for men only; 4 (31%) take healthy volunteers.

Recruiting studies that take each age, of 13
AgeWomenMen
101 (8%)2 (15%)
183 (23%)9 (69%)
303 (23%)13 (100%)
403 (23%)13 (100%)
503 (23%)9 (69%)
653 (23%)5 (38%)
753 (23%)5 (38%)
853 (23%)5 (38%)

Across all 64 studies, recruiting or not: 67% stop at 75 or younger and 66% at 65; 13% take children; 2% are for women only and 88% for men only; 31% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Oligospermia studies take

Of 16 interventional studies with no phase under Oligospermia, half reached primary completion within 26 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase26 mo17–36 · 16 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

What changed recently

From the registry's own updates since Oct 13, 2026.

Newly registered2

Studies

Recruiting first, then most recently updated. Showing 50 of 64. Browse all 64 → or search them.