Similar to results with the age of menarche, later age at first birth was associated with later menopause onset (Beta = 2.67E−01, p = 3.08 × 10–4), lower risks of type 2 diabetes (OR = 0.890 (0.847–0.935), p = 3.65 × 10–6), CHF (OR = 0.926 (0.866–0.991), p = 2.56 × 10–2), essential hypertension (OR = 0.966 (0.957–0.974), p = 3.45 × 10–15), and GAD (OR = 0.975 (0.965–0.985), p = 2.02 × 10–6). This evidence concerns the gene GAD1 and type 2 diabetes mellitus.