[A PRELIMINARY REPORT ON THE USE OF THE VACUUM EXTRACTOR].
D004864:Equipment and Supplies; D005113:Extraction, Obstetrical; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009774:Obstetrics; D011247:Pregnancy; D014618:Vacuum
EQUIPMENT AND SUPPLIES; EXTRACTION, OBSTETRICAL; INFANT, NEWBORN; PREGNANCY