Hormonal imbalance can trigger off an immune reaction. This may lead to conditions like premature ovarian failure. Hormonal disturbance of the thyroid may be diagnosed by a simple blood test. In studies carried out by RESOLVE it was found that 23% – 35% who have suffered from recurrent miscarriage have antithyroid antibodies, compared to 10% – 17% who carry to term. Antithyroid antibodies can be an indication of hypothyroidism, a very common complaint in the UK and may contribute to a woman’s tendency to miscarry.