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Can obesity cause male infertility?

By Marta Barranquero Gómez B.Sc., M.Sc. (embryologist).
Last Update: 09/14/2022

Of course. Different scientists have proven that men with a body mass index over 30 have a poorer seminal quality and, therefore, have greater difficulties in achieving a pregnancy naturally.

The reason for this is that overweight men tend to have low levels of androgens, such as testosterone. As a consequence of this decrease in male sex hormones, spermatogenesis, i.e. sperm production, is affected.

Therefore, men with a high BMI may have oligozoospermia, a semen disorder characterized by a low sperm concentration.

 Marta Barranquero Gómez
Marta Barranquero Gómez
B.Sc., M.Sc.
Embryologist
Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH).
License: 3316-CV
Embryologist. Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH). License: 3316-CV.