When the fruit of the womb comes forth before the seventh month (that is, before it comes to maturity), it is said to be abortive; and, in effect, the children prove abortive, that is, do not live, that are born in the eighth month. Why children born in the seventh or ninth month should live, and not those born in the eighth, may seem strange, and yet it is true. The cause of it is ascribed by some to the planet under which the child is born; for every month, from conception to birth, is governed by its own planet, and in the eighth month Saturn predominates, which is dry and cold; and coldness, being an utter enemy to life, destroys the natural constitution of the child. Hippocrates gives a better reason, viz.:--The infant, being every way perfect and complete in the seventh month, wants more air and nourishment than it had before, and because it cannot obtain this, it tries for a passage out. But if it have not sufficient strength to break the membranes and to come out as ordained by nature, it will continue in the womb until the ninth month, so that by that time it may be again strengthened. But if it returns to the attempt in the eighth month and be born, it cannot live, because the day of its birth is either past or is to come. For in the eighth month Avicunus says, it is weak and infirm, and therefore on being brought into the cold air, its vitality must be destroyed. CURE. Untimely births may be caused by cold, for as it causes the fruit of the tree to wither and fall before it is ripe, so it nips the fruit of the womb before it comes to perfection, or makes it abortive;--sometimes by humidity, which weakens its power, so that the fruit cannot be retained until the proper time. It may be caused by dryness or emptiness, which rob the child of its nourishment, or by an alvine discharge, by bleeding or some other evacuation, by inflammation of the womb, and other severe disease. Sometimes it is caused by joy, anger, laughter and especially by fear, for then the heat forsakes the womb, and goes to the heart, and so the cold sinks into the womb, whereby the ligaments are relaxed, and so abortion follows. On this account, Plato recommended that the woman should avoid all temptations to excessive joy and pleasure, as well as all occasions for fear and grief. Abortion may also be caused by the pollution of the air by filthy odours, and especially by the smell of the smouldering wick of a candle, and also by falls, blows, violent exercise, jumping, dancing, etc. SIGNS.