Intrahepatic cholestasis of pregnancy
Intrahepatic cholestasis of pregnancy is a disorder characterized by itching, with onset in the third trimester of pregnancy, without any primary skin lesions with relief of signs and symptoms within two to three weeks after delivery. It affects 0.7% of pregnancies in multiethnic populations and 1.2–1.5% of women of Indians. Prevalence is influenced by genetic and environmental factors and varies among populations worldwide. In Chile, 2.4% of all pregnancies are affected, with a 5% prevalence in women of Araucanian – Indian origin. Pruritus in pregnancy is common, affecting 23% of pregnancies, of which a small proportion will have obstetric cholestasis. A higher incidence is seen in twin pregnancies, following IVF, women of age more than 35 years, with a history of itching in previous pregnancies and in women with a history of the biliary disease. Patients with IVF may present in the second trimester with ICP. The itching/pruritus of obstetric cholestasis is typically worse at