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.
There has been reported a recent case of abortion following a viper-bite, and analogues may be found in the writings of Severinus and Oedman, who mention viper-bites as the cause; but there are so many associate conditions accompanying a snake-bite, such as fright, treatment, etc., any one of which could be a cause in itself, that this is by no means a reliable explanation.

Information from India an this subject would be quite valuable.
The Ephemerides speak of bloodless abortion, and there have been modern instances in which the hemorrhage has been hardly noticeable.
Abortion in a twin pregnancy does not necessarily mean the abortion or death of both the products of conception.

Chapman speaks of the case of the expulsion of a blighted fetus at the seventh month, the living child remaining to the full term, and being safely delivered, the placenta following.

Crisp says of a case of labor that the head of the child was obstructed by a round body, the nature of which he was for some time unable to determine.

He managed to push the obstructing body up and delivered a living, full-term child; this was soon followed by a blighted fetus, which was 11 inches long, weighed 12 ounces, with a placenta attached weighing 6 1/2 ounces.