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Your journey
1What's a trial
4Get in touch
More info
You can access this
clinical trial
if you have
Azoospermia, Nonobstructive or Oligozoospermia
and you are
between 21 and 60
years old
This is a trial in the final phase before the treatment is released on the market.
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The purpose

The investigators hope to learn if Letrozole is effective and safe in improving severe male infertility by increasing testosterone, decreasing oestradiol and stimulating sperm production thereby improving sperm motility (movement) and concentration. The study is being conducted because Letrozole is not yet proven to be a standard treatment in subjects with absent or very low sperm counts. The investigators are hoping to determine whether Letrozole is equal or superior to no treatment.

Provided treatments

  • Drug: Letrozole

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT02900105. The sponsor of the trial is KK Women's and Children's Hospital and it is looking for 28 volunteers for the current phase.
Official trial title:
Effect of Letrozole on Seminal Parameters in Men With Non Obstructive Azoospermia and Severe Oligozoospermia.