Blog
SHBG is the protein that decides how much of your testosterone is actually usable, and it plays a direct role inside the testes too. Here is what a high or low SHBG result means for your fertility.
SCSA, TUNEL, SCD, and Comet all measure sperm DNA fragmentation, but not the same way, and not against the same cutoff. Here is what each test actually does, what the evidence says about which predicts fertility best, and why the number on your report only means something once you know which test produced it.
Enclomiphene, clomiphene, and hCG all raise testosterone through the body's own signaling instead of replacing it, which is why they can preserve fertility where standard TRT cannot. Here is how the three compare on mechanism, evidence, and who each one actually fits.
Most men recover sperm production within a year of stopping TRT, but not all do, and the timeline runs in months, not days. Here is what the actual recovery data shows on odds, predictors, and when to get help.
Testosterone therapy is one of the most common and predictable causes of male infertility, and it is happening in more young men than ever. Here is the actual mechanism, and what verified clinic data says about how often it really happens.
TSH is not part of the reproductive system, but an underactive or overactive thyroid has been linked to lower testosterone, worse sperm quality, and elevated prolactin. Here is what a high or low TSH result actually means for male fertility, and when it is worth testing.
Testosterone therapy can shut down sperm production almost entirely, and most men are never told to get a baseline semen analysis and hormone panel before starting. Here is exactly what to test first, and why the guidelines already say so.
Total motile sperm count, or TMSC, predicts IUI and IVF outcomes better than any single semen parameter alone. Here is what the research actually shows, and where SwimScore is more skeptical than the marketing around it.
A normal semen analysis is real good news, but it was never designed to check for everything. Here is what concentration, motility, and morphology do not measure, and what is worth testing next if you are still not conceiving.
A low sperm concentration with normal motility is a specific, less common pattern with its own set of causes. Here is what the research actually shows, and what is worth checking before assuming the worst.
A controlled sleep lab study shows testosterone drops within days of short sleep, and large population studies link disrupted sleep to worse sperm quality. Here is what the research actually supports, and where the evidence on sleep apnea and testosterone gets more complicated than the headlines suggest.
Excess body fat converts testosterone into estrogen through an enzyme called aromatase, which suppresses the hormones that drive sperm production. Here is what the research actually shows about obesity, weight loss, and sperm quality, and where the evidence is more mixed than it first appears.
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