Myths vs facts: LDL and fertility

The claim that LDL cholesterol directly affects fertility is not clearly supported by evidence. LDL is a precursor for steroid hormones like estrogen and progesterone, which are crucial for reproduction, but elevated LDL alone does not predict fertility outcomes. Myths such as 'High LDL causes infertility' or 'Low LDL improves fertility' are oversimplified and lack robust human data. In reality, underlying metabolic conditions (e.g., insulin resistance, PCOS) can both raise LDL and impair fertility – the link is indirect. Some studies suggest associations between LDL and sperm quality or ovulatory dysfunction, but effect sizes are small and not causal. MyBody-X tests measure LDL as part of the Cardio Risk Check, but they are not validated for fertility assessment. Anyone interpreting LDL in a fertility context should consult a reproductive endocrinologist. Evidence: unclear – mechanistic plausibility without strong human studies.