Abstract

References
1.
Lash
A. F.
Lash
S. R.
(1950 ) Amer. J. Obstet. Gynec. , 59 , 68 .
2.
Malpas
P.
(1938 ) J. Obstet. Gynœc. Brit. Emp. , 45 , 932 .
3.
Shirodkar
V. N.
(1955 ) Congr. int. Gynéc. Obstét. , 1954. Geneva: 3 , 545 .
4.
Swyer
G. I. M.
Daley
D.
(1953 ) Brit. med. J. , i . 1073 .
