The relationship between anogenital distance and age

Area of Science:

• Reproductive Endocrinology
• Human Physiology
• Andrology

Background:

• Anogenital distance (AGD) in adult males has been linked to testicular function.
• Rodent studies indicate AGD is established during fetal development and remains constant.
• It remains uncertain if male AGD is constant throughout adulthood.

Purpose of the Study:

• To investigate whether anogenital distance (AGD) in adult men varies with age.
• To assess the stability of AGD and penile length (PL) across different age groups.

Main Methods:

• Cross-sectional study involving 473 men at a men's health clinic.
• Measurement of anogenital distance (posterior scrotum to anal verge) and penile length using digital calipers.
• Statistical analysis using ANOVA and linear regression to correlate AGD and PL with age and fatherhood status.

Main Results:

• Anogenital distance (mean 39 ± 13 mm) did not significantly differ across age categories in the overall group, fathers, or childless men.
• Penile length also remained constant across age groups.
• Adjusted analyses confirmed no relationship between AGD and age, stratified by fatherhood status.

Conclusions:

• Anogenital distance is consistent among adult men of varying ages.
• AGD may serve as a stable indicator of genital development and function in adult males.
• Longitudinal studies are recommended to confirm these findings.