Season of birth and variations in male reproductive health: A population-based cohort study.

ABSTRACT:

Background

Season of birth has been associated with various later reproductive health outcomes in women, but little is known on the potential associations in men.

Objectives

To investigate the association between season of birth and semen characteristics, testes volume and reproductive hormone levels in young men.

Materials and methods

We conducted a follow-up study of 1058 young men, born 1998 to 2000, from the Fetal Programming of Semen Quality (FEPOS) cohort, Denmark, 2017-2019. Information on season of birth was obtained from the Danish Civil Registration System, and information on male reproductive health outcomes was obtained at a clinical examination, where the men provided a semen and a blood sample and measured testes volume. Percentage differences in semen c

SUBMITTER: Gaml-Sorensen A 

PROVIDER: S-EPMC12670485 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature