共 22 条
[3]
BOYD EF, 1972, AM J OBSTET GYNECOL, V113, P469
[5]
GILLETT PG, 1980, FERTIL STERIL, V34, P121
[7]
HEIKKILA M, 1982, CONTRACEPTION, V25, P561, DOI 10.1016/0010-7824(82)90058-0