If you have one or more of the symptoms of hypothyroidism, or if thyroid disease runs in your family, ask your doctor if you should have a blood test. (hormone.org)
If allergies run in your family, be cautious of what you eat when breastfeeding if your child appears to be suffering. (home.allergicchild.com)
ADHD does run in families, and about 75 % of the cause is genetic. (health.com)