The cause is the most common anomaly of chromosome. Which may be abnormal eggs or sperm, or the embryo breaks. Hormonal issues found that mothers with varying levels of oestrogen and progesterone natam which have an effect on the endometrium, which is the address of the embryo and a source of food for growth hormone, if less endometrial conditions not suitable for growth. The larvae, it continue to flourish not to cause miscarriage and get an accident. Stress, sleep is not enough. Hard work and heavy sticks