Table 2.

Quantitative analysis of CA1 presynaptic boutons

	SSB density, SSB per μm	MSB density, MSB per μm	Percentage of MSBs	Same-cell MSB contacts, MSB synapses per μm	Different-cell MSB contacts, MSB synapses per μm
OVX + O	2.98	0.71	19.2	0.22	0.60
	1.98	0.40	16.7	0.06	0.40
	2.10	0.43	17.0	0.00	0.52
	2.47	0.62	20.0	0.09	0.57
	2.38  ± 0.22	0.54  ± 0.07	18.2  ± 0.8	0.09  ± 0.05	0.52  ± 0.04
OVX + E	4.23	1.30	23.5	0.19	1.30
	2.51	0.84	25.0	0.10	0.78
	2.56	0.90	26.0	0.10	0.86
	2.71	1.08	28.4	0.09	1.22
	2.45	1.39	38.3	0.14	1.57
	2.89  ± 0.34	1.10  ± 0.11**	28.2  ± 2.6*	0.12  ± 0.02	1.15  ± 0.15**

Values represent data for the same dendritic segments shown in Table 1, in the same order. Treatment group averages ± SEM are shown at the bottom of each column. The last OVX + O and OVX + E segments are shown in Fig. 3. *, P < 0.05 from OVX + O; **, P < 0.01 from OVX + O.