Average change in ciliary beat frequency (CBF) for ciliary cells in mice fallopian tube after exposure to RU486. Panel 3A shows cells treated with 1 μM RU486, compared to control cells treated with ethanol (EtOH). Panel 3B shows cells incubated with 1 μM RU486 for 30 minutes before addition of 100 nM progesterone in combination with 1 μM RU486, compared to incubation with RU486 only (1 μM) during the entire period. The CBF was measured during 90 minutes and the change in CBF is the difference between the average CBF during the last 30 minutes of the measurement and the average baseline CBF. CBFs are presented as mean ± SEM. The number of cells used in 3A were 7 in each group from in total 7 animals. For each animal, one cell was allocated to each treatment group. For 3B, the number of cells were 8 in each group from in total 10 animals.