The principles and practice of obstetrics . there are more than two, the labor is still more apt to 257,935 births there were 3431 cases of twins, or about 1 in 75, and 43 catriplets, or 1 in 5561$; among the French, in 39,409 there were 336 cases of twins,or 1 in 108, and 6 of triplets, or 1 in 6568; among the Germans, in 369,080 therewere 4239 cases of twins, or 1 in 87, and 38 of triplets, or 1 in 9765. Taking thewhole we have 666,424 cases, and 8006 of twins, or 1 in 83, and 87 cases of triplets,or 1 in 7443. The following he gives as the rate of mortality: In 1298 cases of twins (i. e.,26
The principles and practice of obstetrics . there are more than two, the labor is still more apt to 257,935 births there were 3431 cases of twins, or about 1 in 75, and 43 catriplets, or 1 in 5561$; among the French, in 39,409 there were 336 cases of twins,or 1 in 108, and 6 of triplets, or 1 in 6568; among the Germans, in 369,080 therewere 4239 cases of twins, or 1 in 87, and 38 of triplets, or 1 in 9765. Taking thewhole we have 666,424 cases, and 8006 of twins, or 1 in 83, and 87 cases of triplets,or 1 in 7443. The following he gives as the rate of mortality: In 1298 cases of twins (i. e.,2696 children) 636 were lost, or about 1 in 4; and out of 12 cases of triplets (i. e.,36 children) 11 were lost, or 1 in 3. This mortality, however, which is very large,as Dr. Churchill properly remarks must be qualified, by allowing for the great num-ber of children whose death could not be attributed to the labor. The mortality to the mother in twin cases has been computed as 1 in 20. (Chur-chills Midwifery, fourth London Edition, p. 443.). THE PRINCIPLES AND PRACTICE OF OBSTETRICS. 433 l>e premature, and the children rarely survive beyond a short must, however, be admitted that there are well-authenticated ex-ceptional instances of the reverse of this latter rule. Dr. Collins cites,within his own knowledge,two examples of triplets having arrived atthe full period of utero-gestation, and were reared healthy of Twin Pregnancy.—Much has been written touchingthe signs of twin pregnancy, and some authors are of opinion thatthere are certain indications of the existence of a compound gesta-tion, which are entirely reliable, and are as follows: A greater andmore rapid increase in the size of the abdomen ; the division of thislatter into two distinct portions by a sort of longitudinal or obliquefissure ; (he movements of the fetus on two surfaces of the abdo-men at one time, with a general increase in the ordinary accompani-ments of pregnancy, such as gastr
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