"At the FOURTH MONTH, the embryo takes the name of 'fetus.' The body is six to eight inches in length. The skin has a rosy color, and the muscles produce a sensible motion. A fetus born at this time might live several hours. At FIVE MONTHS the length of the body is from eight to ten inches. At SIX MONTHS, the length is twelve and one-half inches. The hair appears on the head, the eyes closed, the eyelids somewhat thicker, and their margins, as well as their eyebrows, are studded with very delicate hairs. At SEVEN MONTHS, every part has been increased in volume and perfection; the bony system is nearly complete; length, twelve to fourteen inches. If born at this period, the fetus is able to breathe, cry and nurse, and may live if properly cared for. "At EIGHT MONTHS, the fetus seems to grow rather in length than in thickness; it is only sixteen to eighteen inches long, and yet weighs from four to five pounds. The skin is very red, and covered with down and a considerable quantity of sebaceous matter. The lower jaw, which at first was very short, is now as long as the upper one. Finally, at term, NINE MONTHS, the fetus is about nineteen to twenty-three inches long, and weighs from six to eight pounds. The red blood circulates in the capillaries, and the skin performs the functions of perspiration; the nails are fully developed." Another writer says: "There is a superstition that a child born at eight months is not as liable to live as if born at seven months; indeed, many suppose that an eight months' child never survives. Facts do not prove this idea to be correct. Personally, I have known several eight months' babies to live and do well, and I believe that their chance of life is much greater than if born at seven months." Children born in the seventh month of gestation are capable of living, though great care is required to rear them for the first few months after birth. The "incubators" now so common in large cities have greatly increased the chances of the "seven months' child," and, for that matter, of those born even earlier. There are a number of cases of record where children have been born after six months of gestation, and a few even before the six months, but these cases are rare and unusual, and such children usually die soon after birth. The following table, given by a good authority, shows the average length and weight of the human embryo and fetus: Age. Length in inches. Weight.