Table 1. Group forms of experimental mice.

group	duration of the experiment	N.	diet
SHAM	50 days	6	SF
	100 days	7	SF
	140 days	6	SF
OVX	50 days	6	SF
	100 days	7	SF
	140 days	7	SF
SHAM+L.Ca	50 days	6	L.Ca
	100 days	6	L.Ca
	140 days	6	L.Ca
OVX+L.Ca	50 days	6	L.Ca
	100 days	6	L.Ca
	140 days	6	L.Ca

OVX: ovariectomy+SF, SHAM: sham-operation+SF, OVX+L.Ca: ovariectomy+L.Ca, SHAM+L.Ca: sham-operation+L.Ca. SF: standard laboratory food, L.Ca: low calcium diet.