Why do women have rheumatic disease?

Area of Science:

• Rheumatology
• Immunology
• Endocrinology

Background:

• Most autoimmune rheumatic diseases exhibit a female predominance (gender discrepancy, sexual dimorphism).
• Gonadal hormones are hypothesized to be responsible for this observed sexual dimorphism.
• Pregnancy, a period of significant hormonal fluctuation, is therefore considered a vulnerable time for disease onset or exacerbation.

Purpose of the Study:

• To evaluate the impact of pregnancy on the incidence and severity of autoimmune rheumatic diseases.
• To investigate the role of gonadal hormones in the sexual dimorphism of these conditions.
• To explore alternative explanations for gender discrepancies in autoimmune rheumatic diseases.

Main Methods:

• Review of currently available data on autoimmune rheumatic diseases during pregnancy.
• Comparative analysis of rheumatic diseases with non-rheumatic illnesses exhibiting sexual dimorphism.
• Exploration of potential environmental, genetic, and developmental factors.

Main Results:

• Available data do not support the hypothesis that pregnancy increases the incidence of autoimmune rheumatic diseases.
• Evidence does not indicate that pregnancy worsens the severity of established autoimmune rheumatic diseases.
• Many non-rheumatic illnesses with similar hormonal backgrounds lack sexual dimorphism, suggesting other factors are involved.

Conclusions:

• The role of gonadal hormones in the female predominance of autoimmune rheumatic diseases requires further investigation.
• Environmental, genetic, chromosomal, and in utero sex differentiation factors warrant exploration to explain gender discrepancies.
• The current understanding of sexual dimorphism in autoimmune rheumatic diseases is incomplete.