Table 1.

Characteristics of included studies

Study	Country	Design of study	Study span	Size of sample	Methods of postpartum diagnosis	Point of postpartum follow-up
Hong et al 201936	Korea	Retrospective unicentre cohort study	2005–2014	160	Cervical cytology or/and colposcopy-directed biopsy; cervical excision	10 weeks
Schuster et al 201835	Australia	Retrospective unicentre cohort study	2010–2015	35	Cervical cytology or/and colposcopy-directed biopsy; cervical excision	6–8 weeks
Mailath-Pokorny et al 201634	Austria	Retrospective unicentre cohort study	2005–2010	34	Cervical cytology or/and colposcopy-directed biopsy	8 weeks
Wu et al 201433	China	Prospective unicentre cohort study	2007–2010	114	Cervical cytology or/and colposcopy-directed biopsy; cervical excision	8–12 weeks
Karrberg et al 201332	Sweden	Prospective unicentre cohort study	2001–2009	130	Cervical cytology or/and colposcopy-directed biopsy; cervical excision	10–12 weeks
Ueda et al 200931	Japan	Retrospective unicentre cohort study	1994–2007	32	Cervical cytology and colposcopy-directed biopsy	12 weeks
Serati et al 200830	Italy	Prospective unicentre cohort study	2003–2007	36	Colposcopy-directed biopsy or cervical excision	8–12 weeks
Vlahos et al 200229	Greece	Retrospective unicentre cohort study	1988–1998	78	Colposcopy-directed biopsy or cervical excision	8–12 weeks
Yost et al 199928	USA	Prospective unicentre cohort study	1995–1996	153	Cervical cytology and colposcopy-directed biopsy	6–12 weeks
Grimm et al 202037	Germany	Retrospective unicentre cohort study	2001–2017	60	Cervical cytology or/and colposcopy-directed biopsy; cervical excision	8–12 weeks