[Primary Hyperparathyroidism in Pregnancy]

We present three cases of primary hyperparathyroidism (PHPT) in pregnancy. The clinical presentation of PHPT is not altered by pregnancy; however, the disease constitutes a serious risk for the foetus and the newborn. Although rare, hypercalcaemia should be suspected in pregnant women presenting with polydipsia, polyuria and fatigue as well as hypertension or preterm labour.