Mrs. R——, ætat. 27, married eight years. Was first unwell when eighteen years of age, and continued to be so regularly until she became pregnant, two years from the time of her marriage. She suckled her first child for eleven months; soon after she became unwell, and continued so until she quickened with her second child; a circumstance which she had not the slightest suspicion of, for there was no perceptible difference either in the quantity or appearance of the monthly discharge. During the remaining months of gestation she did not see anything; she afterwards suckled her little one for ten months; and then was obliged to wean the child, having an attack of the cholera. She continued from this time regular for two years; but meeting with a fall, much to her surprise, two or three days after, miscarried of a four months’ child. She is now pregnant again, having been regular every month till she quickened, and expects to be confined, Feb. 1836. In this case then, the female was unwell in two pregnancies till the period of quickening; and in the other for four months, when miscarriage took place from accident. And lastly, it may occur through the _whole_ period of pregnancy. Mrs. F—— is now pregnant for the third time. In her first pregnancy the monthly returns appeared for three periods, regular as to time, and in quantity and appearance as heretofore. During the second child-bearing, at every month till confinement. During the third—her present pregnancy—for three months only. This patient is always unwell while nursing. Mrs. J——, now in her eighth pregnancy. Was unwell every month throughout the first six pregnancies; but the quantity always slightly diminished. In the seventh, the same circumstances occurred; but premature labour was this time induced, between the sixth and seventh months, by a fall. During the present pregnancy she has not seen anything. Is always unwell while suckling. Mrs. P—— is in her fourth pregnancy. In the first three was unwell, at her regular periods, to the time of confinement. The discharge the same in quantity, but rather lighter appearance. Has been unwell in her pregnancy every month up to the present time.[12] The following case proves how important it is that this fact should be generally known; for up to a very late period, some medical men have even denied the possibility of this occurrence.