Fertility and pregnancy
It is unusual for a woman to have osteoporosis when she is young enough to have children. When this does happen, the osteoporosis is often a complication of another disease and the ability to get pregnant would depend on that other disease.
Osteoporosis itself does not prevent a woman from becoming pregnant, but in severe cases women get fractures in their spine during pregnancy. These are painful but do not harm the baby.
If a woman has serious osteoporosis, her physicians might try to deliver the baby by Cesarian section because her pelvic bones might not be able to allow safe passage of the baby's head.