Figure 1.

Effect of intrauterine treatment on fetal viability. Female rats on day 17 of pregnancy were inoculated with either sterile solution (control), killed E. coli or live E. coli bacteria, by either trans-cervical infusion or direct intrauterine injection at laparotomy. Animals were euthanized 24–70 hours later and fetal viability was determined. Displayed on the Y-axis is the percentage of fetuses alive at the time of autopsy. The number of treated dams in each group is also displayed.