[Action of estradiol, calcitonin and weight-loading on the development of osteopenia in tail-suspended female rats].

: Experiments with tail-suspended female rats demonstrated that injection of sinestrol (synthesized estradiol) and myocalcic (sermon calcitonin) on a background of graded weight bearing (suspension interruption for 2 hrs. a day) prevented osteopenia in the spongy metaphyses of the shin-bone deprived of loading.