OVULATION.
The Ovaries are those essential parts of the generative system of the human female in which the ova are matured. There are two ovaries, one on each side of the uterus, and connected with it by the Fallopian tubes; they are ovoidal bodies about an inch in diameter, and furnish the germs or ovules. These latter are very minute, seldom measuring 1/120 of an inch in diameter, and frequently are not more than half that size. The ovaries develop with the growth of the female, so that, finally, at the pubescent period, they ripen and liberate an ovum, or germ vesicle, which is carried into the uterine cavity through the Fallopian tubes. With the aid of the microscope, we find that these ova are composed of granular substance, in which is found a miniature yolk surrounded by a transparent membrane, called the zona pellucida. This yolk contains a germinal vesicle in which can be discovered a nucleus, called the germinal spot. The process of the growth of the ovaries is very gradual, and their function of ripening and discharging an ovum every month into the Fallopian tubes and uterus is not developed until between the twelfth and fifteenth years.
This period, which indicates, by the feelings and ideas, the desires and will, that the subjects are capable of procreation, is called puberty. The mind acquires new and more delicate perceptions, the person becomes plumper, the mammæ enlarge, and there is grace and perfection in every movement, a conscious completeness for those relations of life for which this function prepares them. The period of puberty is also indicated by