Other adults: has a goitre, type 1 diabetes, dyslipidaemia, suspected dementia, radioiodine or surgery for hyperthyroidism, previous neck radiotherapy or surgery for thyroid gland for head and neck cancer, autoimmune disorders, Turner or Down's syndrome, history of postpartum thyroidItis, history of subfertillity, abnormal menstrual cycle or miscarriage, person history of preterm birth or recurrent miscarriage, taking drug treatment such as amiodarone or lithium or postnatal depression.