Evidence check: FTO in the context of Fruchtbarkeit

The provided context does not contain any specific data or studies on FTO in relation to fertility. FTO is primarily known from GWAS for obesity and BMI, and some research suggests a potential link to fertility issues such as PCOS, but this is not covered in the given knowledge. Therefore, the evidence level from this context is unclear. A single genetic test for FTO is insufficient for clinical fertility decisions. A comprehensive assessment should include hormonal status, lifestyle factors, and medical consultation.