Haemophilus influenzae infection and midtrimester abortion.
D002821:Chorioamnionitis / Q000150:complications*; D005260:Female; D006192:Haemophilus Infections / Q000150:complications*; D006193:Haemophilus influenzae; D006801:Humans; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second