Gynaecology & Obstetrics Medical & Surgical Illness Complication Pregnancy 37907502 Most common cause of intrauterine infection: A Rubella B Toxoplasma C Hepatitis D Cytomegalovirus High-Yield Explanation Ans. is d, i.e. CytomegalovirusRef. Williams Obs. 23/e, p 1216, 1217; Harrison 17/e, p 48Most common cause of intrauterine infection is cytomegalovirus.