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Bardt speaks of labor twenty-three days after the flow of the waters; and Cobleigh one of seventeen days; Bradley relates the history of a case of rupture of the membranes six weeks before delivery. Rains cites an instance in which gestation continued three months after rupture of the membranes, the labor-pains lasting thirty-six hours. Griffiths speaks of rupture of the amniotic sac at about the sixth month of pregnancy with no untoward interruption of the completion of gestation and with delivery of a living child. There is another observation of an accouchement terminating successfully twenty-three days after the loss of the amniotic fluid. Campbell mentions delivery of a living child twelve days after rupture of the membranes. Chesney relates the history of a double collection of waters. Wood reports a case in which there was expulsion of a bag of waters before the rupture of the membranes. Bailly, Chestnut, Bjering, Cowger, Duncan, and others also record premature rupture of the membranes without interruption of pregnancy.

Harris gives an instance of the membranes being expelled from the uterus a few days before delivery at the full term. Chatard, Jr., mentions extrusion of the fetal membranes at the seventh month of pregnancy while the patient was taking a long afternoon walk, their subsequent retraction, and normal labor at term. Thurston tells of a case in which Nature had apparently effected the separation of the placenta without alarming hemorrhage, the ease being one of placenta praevia, terminating favorably by natural processes. Playfair speaks of the detachment of the uterine decidua without the interruption of pregnancy.

Guerrant gives a unique example of normal birth at full term in which the placenta was found in the vagina, but not a vestige of the membranes was noticed. The patient had experienced nothing unusual until within three months of expected confinement, since which time there had been a daily loss of water from the uterus.

She recovered and was doing her work. There was no possibility that this was a case of retained secundines.

Anomalies of the Umbilical Cord.--Absence of the membranes has its counterpart in the deficiency of the umbilical cord, so frequently noticed in old reports. The Ephemerides, Osiander, Stark's Archives, Thiebault, van der Wiel, Chatton, and Schurig all speak of it, and it has been noticed since. Danthez speaks of the development of a fetus in spite of the absence of an umbilical cord. Stute reports an observation of total absence of the umbilical cord, with placental insertion near the cervix of the uterus.

There is mentioned a bifid funis. The Ephemerides and van der Wiel speak of a duplex funis. Nolde reports a cord 38 inches long; and Werner cites the instance of a funis 51 inches long.

There are modern instances in which the funis has been bifid or duplex, and there is also a case reported in which there were two cords in a twin pregnancy, each of them measuring five feet in length. The Lancet gives the account of a most peculiar pregnancy consisting of a placenta alone, the fetus wanting. What this "placenta" was will always be a matter of conjecture.

Occasionally death of the fetus is caused by the formation of knots in the cord, shutting off the fetal circulation; Gery, Grieve, Mastin, Passot, Piogey, Woets, and others report instances of this nature. Newman reports a curious case of twins, in which the cord of one child was encircled by a knot on the cord of the other. Among others, Latimer and Motte report instances of the accidental tying of the bowel with the funis, causing an artificial anus.

The diverse causes of abortion are too numerous to attempt giving them all, but some are so curious and anomalous that they deserve mention. Epidemics of abortion are spoken of by Fickius, Fischer, and the Ephemerides. Exposure to cold is spoken of as a cause, and the same is alluded to by the Ephemerides; while another case is given as due to exposure white nude. There are several cases among the older writers in which odors are said to have produced abortion, but as analogues are not to be found in modern literature, unless the odor is very poisonous or pungent, we can give them but little credence. The Ephemerides gives the odor of urine as provocative of abortion; Sulzberger, Meyer, and Albertus all mention odors; and Vesti gives as a plausible cause the odor of carbonic vapor. The Ephemerides mentions singultus as a cause of abortion. Mauriceau, Pelargus, and Valentini mention coughing.

Hippocrates mentions the case of a woman who induced abortion by calling excessively loud to some one. Fabrieius Hildanus speaks of abortion following a kick in the region of the coccyx.

Gullmannus speaks of an abortion which he attributes to the woman's constant neglect to answer the calls of nature, the rectum being at all times in a state of irritation from her negligence. Hawley mentions abortion at the fourth or fifth month due to the absorption of spirits of turpentine. Solingen speaks of abortion produced by sneezing. Osiander cites an instance in which a woman suddenly arose, and in doing so jolted herself so severely that she produced abortion. Hippocrates speaks of extreme hunger as a cause of abortion. Treuner speaks of great anger and wrath in a woman disturbing her to the extent of producing abortion.

The causes that are observed every day, such tight lacing, excessive venery, fright, and emotions, are too well known to be discussed here.