hrp0095rfc6.2 | Sex Development and Gonads | ESPE2022

Dynamic changes of reproductive hormones in male minipuberty: Temporal dissociation of Leydig- and Sertoli-cell activity

S. Busch Alexander , Lindhardt Ljubicic Marie , N Upners Emmie , Bistrup Fischer Margit , Lau Raket Lars , Frederiksen Hanne , Albrethsen Jakob , Holm Johannsen Trine , P Hagen Casper , Juul Anders

Background: The male Hypothalamic-Pituitary-Gonadal (HPG) axis is transiently active during the first months of life with surging serum concentrations of reproductive hormones. This period, termed minipuberty, promotes masculinization, including testicular, and penile growth, as well as further testicular descent in males. It appears to be essential for priming specific cell types, i.e. Sertoli-, Leydig-, and germ cells, including subsequent growth and maturat...

hrp0097fc7.4 | Sex differentiation, gonads and gynaecology or sex endocrinology | ESPE2023

The effect of common genetic variants in CYP19A1 on serum Estradiol to Testosterone Ratio in healthy Danish children and adolescents

L. R. Groendahl Veronica , A. Holmboe Stine , S. Busch Alexander , Aksglaede Lise , P. Hagen Casper , H. Johannsen Trine , H. Petersen Jørgen , Almstrup Kristian , Frederiksen Hanne , Juul Anders

Background and Aim: Despite the broad individual variation of pubertal maturation, references traditionally describe growth in relation to just chronological age and not biological age. Hence, growth references for the adolescent period have been of limited usefulness for monitoring individual growth in clinic and for research. Especially for children and adolescents with chronic diseases is there a need to better evaluate if changes in SD-scores just before a...

hrp0098fc3.6 | Pituitary, Neuroendocrinology and Puberty 1 | ESPE2024

Adolescent Acne: Association to Sex, Age, Pubertal Stage and Circulating Concentrations of Testosterone and DHT

E. Jakobsen Nanna , A. Holmboe Stine , Holm Petersen Jørgen , Aksglaede Lise , P. Hagen Casper , S. Busch Alexander , Holm Johannsen Trine , Frederiksen Hanne , Juul Anders

Background: Presence of current acne is well described in adolescents and adults with altered sex steroid levels, e.g., in polycystic ovarian syndrome, androgen producing tumors and misuse of anabolic androgenic substances. However, less is known about the impact of physiological concentrations of testosterone and dihydrotestosterone (DHT) quantified by gold standard LC-MS/MS methodologies on the development of acne in healthy adolescent boys and girls.<p ...

hrp0098fc13.6 | Pituitary, Neuroendocrinology and Puberty 2 | ESPE2024

Voice frequency in healthy children and adolescents: A biomarker of androgen action in puberty

A Holmboe Stine , Vilmann Lea , R Grøndahl Veronica , E. Thomsen Charlotte , Ø. Fritzbøger Andrés , Edström Pernille , S. Busch Alexander , Aksglaede Lise , P. Hagen Casper , Juul Anders

Introduction: The pubertal transition is accompanied by voice break in boys. Studies asking men to retrospectively recall their age at voice break report an average age of voice break corresponding to 13.4-14.0 years. However, it may be difficult to remember precisely when your voice broke, and recall bias is quite large. Little is known about voice frequency in boys and girls in relation to pubertal timing.Aim: To asses...