How are IgG and fertility related?

The link between IgG food antibodies and fertility is poorly supported by scientific evidence. IgG tests are often marketed as 'food sensitivity' panels, but their clinical relevance for fertility is unclear. While chronic inflammation or immune reactions to certain foods could theoretically affect implantation or hormonal balance, robust randomized controlled trials are lacking. Moreover, IgG antibodies often indicate food tolerance rather than intolerance. True food allergies (IgE-mediated) are different and can be relevant, but IgG testing is not a validated tool in reproductive medicine. For fertility issues, focus on proven factors: cycle tracking, hormone levels, sperm quality, and lifestyle. Be cautious of commercial claims that overstate the role of IgG in fertility.