共 16 条
[1]
ARNOLD F, 1990, COMP STUDIES, V2, P25
[2]
COLLINS JA, 1989, FERTIL STERIL, V52, P15
[3]
DUCOT B, 1991, J GYNECOL OBST BIO R, V5, P653
[4]
GRAY RH, 1990, CURR OPIN OBSTET GYN, V2, P313
[5]
GREENHALL E, 1990, FERTIL STERIL, V54, P978
[6]
LI Y, 1990, INT J FERTIL, V35, P347
[9]
MOSHER WD, 1987, VITAL HTLH STATISTIC, V23
[10]
PAGE H, 1989, FERTIL STERIL, V51, P571