Three months after buying Healthology, iVillage struck again, purchasing HeathCentersOnline, another health publisher, for $11 million in cash and $1 million in stock. The company runs HeathCenterOnline, AllergyHealthOnline and HeathlyLivingOnline. iVillage, known for its focus on women, has been increasingly gunning for the medical market. It provides health content to MSN.