The Claim

Testosterone deficiency is associated with reduced fertility and a significant decrease in sperm count.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
45score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
2 studies reviewed
In plain English

Low testosterone levels are linked to lower sperm count and reduced ability to conceive.

See the scientific wording

Testosterone deficiency decreases fertility and significantly lowers sperm count.

Why this might work

Low testosterone stops the testes from making sperm because the cells that produce testosterone and support sperm development don't get the signals they need. When testosterone and another hormone called FSH are restored, these cells start working again, the sperm-making tubes in the testes get thicker, and sperm begin to appear in semen.

Verified mechanismbased on 2 studies

What the research says

2 studies

  1. Study: Effectiveness of clomiphene citrate on total motile sperm count and hormonal profile in men with clinical infertility.

    When men took a pill that raised their testosterone, their sperm count went up too — suggesting that low testosterone is connected to having fewer sperm.

  2. Study: Alterations in the ultrasound appearance of seminiferous tubules after gonadotropin treatment in patients with azoospermia because of hypogonadotropic hypogonadism

    When men had very low testosterone, they had no sperm. But when doctors gave them hormones to boost testosterone, sperm started appearing in their semen — and the more the testicles changed in size, the more sperm they made.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.