
Despite the potent effect of intermittent PTH treatment on promoting new bone formation, BMD rapidly decreases upon discontinuation of PTH administration. To uncover the mechanisms behind this adverse phenomenon, we investigated the immediate responses in bone microstructure and bone cell activities to PTH treatment withdrawal and the associated long‐term consequences. Unexpectedly, intact female and estrogen‐deficient female rats had distinct responses to the discontinuation of PTH treatment. Significant tibial bone loss and bone microarchitecture deterioration occurred in estrogen‐deficient rats, with the treatment benefits of PTH completely lost 9 weeks after discontinuation...
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