systematic review National Center for Biotechnology Information NCBI NLM MEDLINE review humans pubmed abstract nih national institutes of health national library of medicine health policy pregnancy female pregnancy complications infectious / microbiology streptococcal infections / prevention & control* infectious disease transmission infectious / drug therapy* vertical / prevention & control* initials='g' affs=[] is_editor=false suffix=none equal_contrib=false) initials='a' initials='p' initials='k' affs=[]) initials='s' initials='m' initials='i' initials='v' streptococcus agalactiae* initials='t' author(firstnames='michael' lastname='cooper' initials='gl' initials='me' author(firstnames='alberto' initials='y' initials='cn' author(firstnames='martin' equal_contrib=false)] pmid:29117324 pmc5850619 doi:10.1093/cid/cix654 kirsty le doare megan o'driscoll collabauthor(name='gbs intrapartum antibiotic investigator group' investigators=[author(firstnames='angela' lastname='ramoni' author(firstnames='rikke bek' lastname='helmig' initials='rb' author(firstnames='kaarin' lastname='makikallio' author(firstnames='tengiz' lastname='asatiani' author(firstnames='menachem' lastname='fisher' lastname='feinstein' author(firstnames='yuval' lastname='oz' author(firstnames='matan elami' lastname='suzin' author(firstnames='vered' lastname='eisenberg' lastname='berardi' author(firstnames='indi' lastname='trehan' author(firstnames='georgia leigh' lastname='macad' author(firstnames='miha' lastname='lucovnik' author(firstnames='claire nkiruka' lastname='oluwalana' author(firstnames='pippa' lastname='letchworth' lastname='jagoutz-herzlinger' author(firstnames='francis githae' lastname='muriithi' initials='fg' author(firstnames='kouther issa' lastname='yassen' initials='ki' author(firstnames='gerard' lastname='visser' author(firstnames='sophie' antibiotic prophylaxis* / methods