Sexual Dimorphism in Mammals

A 25-year-old male experienced increased testosterone and estradiol levels after starting finasteride for hair loss, leading his doctor to suggest a testicular ultrasound as a precaution. The user questions the necessity of the ultrasound, considering it potentially excessive, while others suggest it could be a useful precaution to rule out any issues.

A user on Finasteride for 7-8 years reported unexpectedly high testosterone levels despite expecting lower levels due to age, with discussions on the impact of SHBG and suggestions to use boron to lower SHBG. Another user noted that Dutasteride significantly increased their testosterone and free testosterone levels.

The user received hormone test results showing normal estradiol and testosterone levels, low SHBG, and normal free androgen index. They are considering starting finasteride but are concerned due to being slightly overweight.

Finasteride's effectiveness and side effects may vary based on male phenotypes, with some users noting differences in response related to body and facial hair characteristics. Some users report success with lower doses, while others experience side effects, suggesting individual variability in response to the treatment.

A 22-year-old male has been using finasteride for 4 months without major side effects but is concerned about hormone test results showing low SHBG and high estrogen. He plans to consult a doctor and is considering alternatives like minoxidil or topical finasteride to avoid health issues.

Finasteride may affect male offspring's fertility and hormonal balance, with debates on whether to discontinue use before conception. Some users report no issues, while others highlight the high doses used in rat studies.