Abstract
References
1.
Egorova
E V
. (1967 ) Akusherstvo i Ginekologiya (Moskva)
43 , 15 –22 .
2.
Farrior
H L
Rathbun
L S
. (1969 ) American Journal of Obstetrics and Gynecology
103 , 908 –909 .
3.
Moir
J A
. (1970 ) Journal of the American Medical Association
212 , 2260 .
4.
Stevenson
A
. (1957 ) Journal of Obstetrics and Gynæcology of the British Commonwealth
64 , 365 .