Table 1. Injection dates and doses of IdU and CldU (mg/Kg) administered to animals in each experimental group.

	CldU			IdU
	Date (Days)	Dosage (mg/Kg)		Date (Days)	Dosage (mg/Kg)
GROUP A	−14, −13, −12, −11		57.65	−28, −27, −26, −25	42.75
GROUP B	−21, −20, −19, −18		57.65	−7, −6, −5, −4	42.75
GROUP C	−56, −55, −54, −53		57.65	−42, −41, −40, −39	42.75
GROUP D	−49, −48, −47, −36		57.65	−7, −6, −5, −4	42.75
GROUP E	-		-	-	-

Group E animals received no injections and they were used to determine the hippocampal mRNA expression. Note that the doses were based on equimolar doses of 50 mg/kg BrdU. To avoid ethe ffects of the estrous cycle, animals received one injection of CldU or IdU on 4 successive days.