Table 3.

τ-Decay time constant for GABA-gated current (msec)

Control	6043.7  ± 1247.3
Pseudopregnant, 1 d wd	978.7  ± 114*
Pseudopregnant, 2 d wd	3898.6  ± 498**
Pseudopregnant	5897  ± 1003

The decay time for GABA current (τ) is reduced 84% (p < 0.005) 1 d after progesterone withdrawal. No difference in τ is noted for pseudopregnant rats not undergoing withdrawal. Time constants were estimated with a first order exponential decay function using Origin software (Microcal, Inc.). These results are representative of those observed in 15–16 cells per 6 rats per group.

*p < 0.005 versus control, pseudopregnant.

**p < 0.05 versus control, pseudopregnant.