use of obstetric pessarium in the opening of the cervix of the pregnant uterus

baby belly belt birth body cable care cervix child childbirth clamp complication cord embryo entanglement expectant fetal fetus foetus gestation gynecology head healthcare human infant maternity medical medicine midwifery navel newborn obstetric obstetrics pathology pessarium placenta placental ppessary pregnancy pregnant prenatal supporting umbilic umbilical unborn uterus womb women