Referencias
ACOG. Clinical management guidelines of obstetrician-gynecologists. Medical management of abortion. Obstet Gynecol. 2005 Oct;106(4):871-82.
Gabbe SG, Niebyl JR, Simpson JL. Obstetrics - Normal and Problem Pregnancies. 4th ed. New York, NY: Churchill Livingstone; 2002:622-644.
Stenchever A. Comprehensive Gynecology. 4th ed. St. Louis, Mo: Mosby; 2001:413-434.