Abstract

References
1.
Hicks
J. Braxton
(1872 ) Trans, obstet. Soc. Lond. , 13 , 216 .
2.
Nixon
W. C. W.
(1948 ) Proc. R. Soc. Med. , 41 , 311 .
3.
Redman
T. F.
(1953 ) Amer. J, Obstet. Gynec. , 66 , 607 .
4.
Bösch
K.
(1954 ) Personal communication.
5.
Halliday
E. C.
Heyns
O. S.
(1952 ) J. Obstet. Gynaec., Brit. Emp. , 59 , 309 .
6.
Williams
E. A.
Stallworthy
J. A.
(1952 ) Lancet , i , 330 .
7.
Garrett
W. J.
(1955 ) J. Obstet. Gynaec. Brit. Emp. , 62 , 145 .
8.
Moir
J. C.
(1932 ) Brit. med. J. , i , 1022 .
9.
Embrey
M. P.
Garrett
W. J.
(1955 ) J. Obstet. Gynæc. Brit. Emp. , 62 , 150 .
