[Perinatal bone and calcium metabolism in the patient complicated with renal dysfunction.]

The incidence of pregnancy complicated with renal dysfunction has tended to increase due to aging and progress in the treatment methods. Generally, pregnancy is allowed only in women with normal renal function and in patients with mild renal insufficiency; therefore, the incidence of osteoporosis and the resulting fragile fracture is rare during pregnancy complicated with renal dysfunction. In recent years, the incidence of pregnancy in dialysis patients and in patients who have undergone kidney transplantation has been increasing due to the progress in treatment methods. Eventually, it has become possible for patients with renal dysfunction to give birth as long as they fulfill certain conditions for pregnancy; however, the rate of preterm births has remained high. The incidence of femoral neck fracture has been about 5 times more in dialysis patients than in healthy individuals; however, the prevention and treatment of osteoporosis in pregnant dialysis patients have been difficult, since many osteoporosis medications are contraindicated in pregnant women and also their pregnancy period is not long due to the higher rate of preterm births.