pregnant long-evans hooded rats were intravaginally administered nonoxynol-9 , a non-ionic surfactant used as a spermicidal agent in delfen contraceptive cream ( ortho pharmaceutical corporation , raritan , n.j. ) at dosages of 4 or 40 mg/kg/day ( 2 and 20 times the clinical usage ) on days 6 through 15 of gestation .
C0132776
nonoxynol-9
C0032961
gestation