In Persia, and indeed in most Mahomedan countries where a plurality of wives is allowed, it is considered indecent to approach a woman for sexual intercourse during pregnancy, or when she is suckling her child. This custom is highly commendable, and if observed among Christians it would tend to promote the health of both the mother and her offspring, for Nature never intended that the nuptial act should be performed solely for the gratification of our passions. Nevertheless, I do not say that a moderate indulgence during pregnancy would be hurtful to a robust woman; though to a weak and nervous one it surely is. But after the child is born, sexual intercourse should cease until it is weaned, to insure its health. Many sucking children die in consequence of the sexual indulgences of their parents, and none are wholly unaffected thereby. TIME AND MANNER OF IMPREGNATION. We have stated elsewhere that there are certain times during the month when it is impossible for a woman to be impregnated by sexual connection. This is a fact that may be relied upon with the utmost certainty, and we will discuss it more in detail. The Vesicles of the Ovary are constantly growing and ripening, as we have shown. Once in four weeks one or more of them is ready to leave its cell. Inflammation commences—which is called the Menstrual Flow—the Vesicle then begins to enlarge, and by the time the flow ceases, it bursts open, when the Ovum or Egg within escapes and is taken up by some very curious little membranes and drawn into the Fallopian Tube. It passes through this tube into the Womb, and it is generally two days, and often longer, in making the passage. Meantime a thin, delicate membrane, called the Decidua, forms in the Womb, and is ready to receive the Egg and detain it there, otherwise it would pass out and be lost. This membrane will generally last about a week, when it gradually loosens and passes out, taking the Egg along with it. If, however, the Egg be impregnated—in other words, if the female have connection with a man, and the Semen comes in contact with the Egg during this period, the Decidua from that moment begins to grow fast to the Womb, and becomes one of the coverings that protect the new being during the fœtal state.