Osteoporosis is common in people aged 50 and over, but the disease can strike the younger age groups. Osteoporotic fracture associated with pregnancy and breast feeding is rare, so its treatment is not well understood, not to mention the natural course of treated osteoporotic fracture.[1] Pregnancy-induced osteoporosis was reported in 1955 for the first time.[2] Parathyroid hormone-related protein (PTHrP) is likely to be responsible for osteoporotic fracture.[3] The symptom is also claimed as the consequence of disturbed bone formation during pregnancy in which bone resorption continued until mid-pregnancy while bone formation remains slow until 28 weeks.[4] We experienced a case of a woman who had osteoporotic fracture three months after delivery without a history of significant disease. Teriparatide was used for treatment.