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Related Concept Videos

Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
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Related Experiment Video

Updated: Jul 11, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
10:46

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

Sexual habits before multiple sclerosis: a national case-control study.

Øjvind Lidegaard1, Anne Louise Svendsen

  • 1Gynaecological Clinic 4232, Rigshospitalet, Copenhagen Ø, Denmark. Lidegaard@dadlnet.dk

Multiple Sclerosis (Houndmills, Basingstoke, England)
|September 26, 2007
PubMed
Summary

This study found no link between sexual practices, including oral sex and sperm exposure, and the risk of developing multiple sclerosis (MS). The findings do not support the hypothesis that MS is a sexually transmitted disease.

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Modeling Multiple Sclerosis in the Two Sexes: MOG35-55-Induced Experimental Autoimmune Encephalomyelitis
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Modeling Multiple Sclerosis in the Two Sexes: MOG35-55-Induced Experimental Autoimmune Encephalomyelitis

Published on: October 13, 2023

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Last Updated: Jul 11, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
10:46

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Published on: December 9, 2015

Modeling Multiple Sclerosis in the Two Sexes: MOG35-55-Induced Experimental Autoimmune Encephalomyelitis
05:44

Modeling Multiple Sclerosis in the Two Sexes: MOG35-55-Induced Experimental Autoimmune Encephalomyelitis

Published on: October 13, 2023

Area of Science:

  • Neurology
  • Epidemiology
  • Sexual Health

Background:

  • The exact cause of multiple sclerosis (MS) remains unknown despite extensive research.
  • Recent hypotheses suggest MS might be a sexually transmitted disease, diagnosed typically in reproductive years.

Purpose of the Study:

  • To investigate the association between early-life sexual practices and the risk of developing MS.
  • Specifically, to assess the impact of oral sex and oral sperm exposure on MS risk.

Main Methods:

  • A national case-control study involving Danish women diagnosed with MS between 1998-2005.
  • Data collected via postal questionnaires from 604 cases and 619 controls, analyzed using logistic regression.

Main Results:

  • No significant differences were found in various sexual practices (including oral sex, oral sperm exposure, age at sexual debut, number of partners) between women with and without MS.
  • Family history of MS was a significant risk factor.

Conclusions:

  • Early-life sexual practices, oral sex, or oral sperm exposure are not associated with an increased risk of developing MS.
  • The study does not support the hypothesis that MS is sexually transmitted.