Serum Testosterone Levels in 3-Month-Old Boys Predict Their Semen Quality As Young Adults

Overview

Journal J Clin Endocrinol Metab

Publisher Oxford University Press

Specialty Endocrinology

Date 2022 Mar 24

PMID 35323957

Authors

Louise Scheutz Henriksen

Jorgen Holm Petersen

Niels E Skakkebaek

Niels Jorgensen

Helena E Virtanen

Laerke Priskorn

Anders Juul

Jorma Toppari

Katharina M Main

Affiliations

Soon will be listed here.

Abstract

Context: It remains unknown how the postnatal activation of the hypothalamic-pituitary-gonadal axis in infancy, also known as "minipuberty", relates to adult testis function.

Objective: To investigate how markers of reproductive function in 3-month-old boys correlate with adult reproductive health parameters.

Methods: This population-based birth cohort study (the Copenhagen Mother-Child cohort), conducted at Copenhagen University Hospital, Denmark, included 259 boys examined once around 3 months of age and again at 18 to 20 years. Reproductive hormones, penile length, testis volume, and semen quality were analyzed. Minipubertal markers of testis function (by tertiles, T1-T3) were explored as predictors of adult semen quality using linear regression models. Associations between reproductive outcomes in infancy and young adulthood were estimated by intraclass correlation coefficients (ICCs), describing how well measurements in infancy correlate with those in adulthood.

Results: Serum testosterone concentration in infancy was positively associated with adult total sperm count. Median (IQR) total sperm count was 84 (54-138) million spermatozoa for boys in T1, 141 (81-286) million spermatozoa in T2, and 193 (56-287) million spermatozoa in T3. We found the highest ICC for FSH (0.41; 95% CI, 0.26-0.57), while ICCs for inhibin B, SHBG, penile length, and testis volume ranged between 0.24 and 0.27. ICCs for LH and for total and free testosterone were lower and statistically nonsignificant.

Conclusion: Serum testosterone in infancy was a predictor of adult total sperm count. Other reproductive hormones and genital measures showed good correlation between infancy and adulthood, suggesting that an individual's reproductive setpoint starts shortly after birth in boys and persists until adulthood.

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