Questionnaire
The content of the questionnaire was asked by a professionally trained
clinician. Each pregnant woman had a unique medical record number and
the basic information,
past medical history,
symptoms of genital tract infection, signs of genital tract infection,
fertile history, personal hygiene habits, and sexual experience were
recorded through the questionnaire. Correction of gestational age based
on ultrasound of first appearance of fetal heart and buds or last
menstrual period.