Table 2.

Characteristics of included retrospective studies.

	Author, Year, Country of Origin	Title	Journal	Patients Included	Age	Gestation Week	Diagnosis	Risk of Bias *
17	Wong D et al. [2] 2012, Hong Kong	Management of severe odontogenic infections in pregnancy.	Aust Dent J.	5	33; 32; 22; 26; 29	33; 35; 8; 10; 30 weeks	dental abscess	F
18	Doumbia-Singare K. et al. [8] 2014, Mali	Cervico-facial cellulitis during pregnancy: about a series of 10 cases in Mali.	Bull Soc Pathol Exot.	10	23 (range 16–31)	1 first trimester; 6 second and 3 third trimester	odontogenic infection + DNI	F
19	Osunde O et al. [9] 2014, Nigeria	Management of Ludwig’s Angina in Pregnancy: A Review of 10 Cases.	Ann Med Health Sci Res.	10	29.5 years SD ± 5.3	third trimester	Ludwing’s angina	G
20	Ali EAM. et al. [26] 2019, Sudan	Delay in the Referral of Pregnant Patients with Fascial Spaces Infection: A Cross-Sectional Observational Study from Khartoum Teaching Dental Hospital, Sudan.	J. Maxillofac. Oral Surg.	10	26.5 years SD ± 6.3	6 third trimester; 4 second trimester	7 submandibular abscess; 1 submental abscess; 2 Ludwig’s angina	F
21	Omeje KU. et al. [3] 2020, Nigeria	Severe Cervicofacial Cellulitis in Pregnancy—A Review of 18 Cases.	Iran J. Otorhinolaryngol.	18	29 years SD ± 7.1	12 third trimester; 4 second; 2 in the first trimester	Cervicofacial cellulitis	F

DNI: deep neck infection. * JBI Critical Appraisal Checklist to assess their risk of bias. Quality Rating: poor 0–3; fair 4–7; good 8–10 [11].