Split and simplify the following sentence while retaining its full meaning: Osteoporosis Osteoporosis is a disease that involves the thinning and weakening of the bones and is common in women after the menopause , but can also occur in men .
 Simplified version:
Osteoporosis Osteoporosis is a disease causing thinning and weakening of the bones . It is common in women after menopause but can also occur in men .