Abstract
References
1.
Abramovich
D R
. (1968 ) J. Obstet. Gynæc. Brit. Cwlth
75 , 728
2.
Anderson
A B M
Turnbull
A C
. (1968 ) Acta obstet. gynec. scand.
47 , 1
3.
Cameron
J M
Dayan
A D
. (1966 ) Brit. med. J.
i , 1010
4.
Rhodes
P
. (1966 ) J. Obstet. Gynæc. Brit. Cwlth
73 , 23
5.
Wagatsuma
T
. (1965 ) Amer. J . Obstet. Gynec.
93 , 743