How are IgE and fertility related?

The provided knowledge contexts do not contain direct information on the relationship between IgE and fertility. From general medical knowledge, IgE is primarily involved in allergic responses. There is some evidence that allergies – for example, antisperm antibodies or allergies associated with endometriosis – may affect fertility, but the evidence is weak and largely mechanistic. An elevated total IgE level alone is not an established fertility marker. Individuals with specific fertility concerns should pursue more targeted testing (hormonal panels, semen analysis, allergy workup if indicated). The current evidence does not support robust recommendations based solely on IgE levels.