Table 1. Mean (SEM) Amplitudes (Analogue-to-Digit Units) Over Pulse-Alone Trials, and Latencies to Response Peak (ms) for Pulse-Alone Trials, PPI, and PPF Trials During the Follicular and Luteal Phases.

Measure	Follicular phase	Luteal phase
	mean (SEM)	mean (SEM)
Amplitude
First pulse-alone trial (initial reactivity)	670.06 (120.45)	755.87 (118.17)
Blocks: each of 3 pulse-alone trials
Block 1	564.20 (107.78)	626.20 (118.76)
Block 2	472.38 (119.04)	471.01 (87.43)
Block 3	487.83 (127.94)	462.94 (97.19)
Latencies to response peak for pulse-alone, PPI, and PPF trials
Pulse-alone	57.86 (2.13)	60.93 (1.60)
PPI
30 ms prepulse-to-pulse interval	55.57 (1.75)	58.33 (2.09)
60 ms prepulse-to-pulse interval	55.99 (3.17)	54.88 (1.96)
120 ms prepulse-to-pulse interval	57.41 (2.56)	62.59 (3.07)
240 ms prepulse-to-pulse interval	59.21 (3.95)	63.47 (3.84)
480 ms prepulse-to-pulse interval	58.99 (3.29)	61.03 (3.54)
PPF
1000 ms prepulse-to-pulse interval	58.54 (2.73)	61.27 (2.15)
2000 ms prepulse-to-pulse interval	56.97 (2.77)	57.34 (1.75)
3000 ms prepulse-to-pulse interval	56.46 (1.47)	62.18 (2.04)
4500 ms prepulse-to-pulse interval	59.98 (2.48)	60.72 (1.81)
6000 ms prepulse-to-pulse interval	60.11 (1.87)	59.09 (1.68)