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Unsafe Sex clinical trials

The registry lists 55 studies for Unsafe Sex across more than 10 countries. 9 are recruiting or about to start. 17 of them are mainly about Unsafe Sex (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-12.

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Example · made-up studies

Breast cancer · Recruiting: 2 came in, 3 changed

What changed in your saved searches, Oct 31 – Nov 6:

A study of drug A after surgery for early breast cancer

Came in · now Recruiting

Drug B with hormone therapy in advanced breast cancer

Changed

· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

Exercise during chemotherapy

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Status

Completed
42
Recruiting
7
Not yet recruiting
2
Status unknown
2
Terminated
1
Withdrawn
1

Phase

Phase 1
4
Phase 2
4
Phase 3
3

Where

United States
40
Brazil
2
China
2
Peru
1
France
1
Russian Federation
1

Who runs them

Child Trends (5) · Centers for Disease Control and Prevention (4) · Boston University Charles River Campus (3) · Johns Hopkins Bloomberg School of Public Health (3) · Brown University (3) · University of Washington (3) · Boston Medical Center (2) · RTI International (2)

Coming up

1phase 3 study under way
2studies 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 2

Who these studies take

Of the 7 Unsafe Sex studies recruiting now, 2 (29%) set no upper age limit and 5 (71%) stop at 75 or younger. 3 (43%) take children under 18. 2 (29%) are for women only and 1 (14%) for men only; 6 (86%) take healthy volunteers.

Recruiting studies that take each age, of 7
AgeWomenMen
100 (0%)0 (0%)
186 (86%)5 (71%)
301 (14%)2 (29%)
401 (14%)2 (29%)
501 (14%)2 (29%)
651 (14%)2 (29%)
751 (14%)2 (29%)
851 (14%)2 (29%)

Across all 55 studies, recruiting or not: 64% stop at 75 or younger and 62% at 65; 33% take children; 24% are for women only and 24% for men only; 65% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Unsafe Sex studies take

Of 32 interventional studies with no phase under Unsafe Sex, half reached primary completion within 35 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase35 mo17–46 · 32 studies—35 mo17–46 · 32 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 14, 2026.

Newly registered1

Studies

Recruiting first, then most recently updated. Showing 50 of 55. Browse all 55 → or search them.