Experiment 1 (%)

Experiment 2 (%)

Detected fetusesa/ET

9/21 (43)

8/37 (22)

Births/ET

5/21 (24)

8/37 (22)

Births/Detected fetusesa

5/9 (56)

8/8 (100)

Pregnant/Total females

4/6 (67)

5/10 (50)

Births/Pregnant females

5/4 (125)b

8/5 (160)c