Fertility drug showdown: which boosts sperm better?
NCT ID NCT07523022
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study compares two medications—gonadotropin and clomiphene citrate—to see which better improves sperm health in men with fertility problems. About 500 men with abnormal sperm analysis will be randomly assigned to one of the drugs. The goal is to measure changes in sperm count, movement, shape, and DNA quality to help more couples succeed with assisted reproduction.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 500 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Sep 2024
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Male participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * abnormal sperm analysis result, APHRODITE 2,3,4 categories Exclusion Criteria: * obstructive azoospermia * non-obstructive azoospermia due to genetical defects (Klinefelter-syndrome, AZFa, AZFb microdeletion syndrome etc) * problems with the administration of subcutaneous injections * disagreement
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Reproductive Medicine Centre, Department of Obstetrics and Gynecology, University of Szeged
Szeged, 6724, Hungary
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Other studies related to the condition(s) this trial covers.
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- Surgery for enlarged scrotum veins may boost sperm health by reducing immature cells