Table 1.

Clinical characteristics of COVID-19 pregnancies.

Source	COVID-19-associated pregnancies (n)	SARS-CoV-19-positive placenta (n)	Age of the mother (years)	Sex of the child	Live births (n), thereof premature births (n)	Intrauterine death (gestational age in weeks)
Total (n/N, %)	1452	50/580, 9%	mean ca. 31	∼1:1	1040/1066, 98% (95/636, 15%)	25/1227, 2%
[22]	16	n.a.	mean 32	n.a.	15 (1)	1 (16th week)
[23]	20	n.a.	mean 31	n.a.	20 (4)	0
[24]	29	n.a.	n.a.	n.a.	29 (n.a.)	0
[25]	51	0	10 > 37 years, 41 ≤ 37 years	n.a.	51 (n.a.)	0
[26]	20	[unclear#]	mean 31	n.a.	19 (9)	1 (22nd week)
[27]	74	2	n.a.	n.a.	71 (n.a.)	n.a.
[28]	50	n.a.	mean 30	n.a.	50 (2)	0
[29]	15	[15##]	mean 32	6 male, 9 female	15 (n.a.)	n.a
[30]	21	n.a.	mean 28	n.a.	21 (3)	0
[31]	77	n.a.	mean 30	n.a.	77 (7)	0
[41]	187	n.a.	n.a.	n.a.	n.a.	0
[32]	75	1	n.a.	n.a.	75 (n.a.)	0
[33]	11	[11##]	mean 33	4 male, 3 female, 5 unknown	6 (4)	5 (22-40th week)
[34]	50	n.a.	mean 29	n.a.	n.a.	n.a.
[35]	34	n.a.	mean 26	16 male, 18 female	34 (4)	0
[36]	27	n.a.	mean 27	16 male, 11 female	23 (n.a.)	4 (n.a.)
[37]	101	n.a.	n.a.	n.a.	101 (n.a.)	0
[38]	65	0	[median 30]	n.a.	65 (12)	2 (2nd trimester)
[39]	21	n.a.	[median 33]	n.a.	21 (2)	0
[40]	32	n.a.	mean 32	n.a.	32 (4)	0
[21]	71	[unclear#]	mean 31	n.a.	71 (7)	0
[20]	27	2	[median 32]	14 male, 15 female	27 (n.a.)	n.a.
[19]	64	7	mean 32	n.a.	64 (3)	0
[18]	19	1	mean 32	n.a.	18 (7)	1 (29th week)
[17]	31	5	mean 31	15 male, 16 female	30 (n.a.)	1 (n.a.)
[16]	59	2	n.a.	n.a.	n.a.	n.a.
[15]	54	22	mean 32	n.a.	52 (9)	2 (30th and 37th week)
[14]	90	n.a.	mean 34	n.a.	n.a.	0
[13]	22	4	mean 31	n.a.	14 (6)	8 (22-40th week)
[12]	39	4	mean 34	n.a.	39 (11)	0

Abbreviation: not specified (n.a.); result of virus detection is not clear from the publication (#); inclusion criterion in this publication was a positive virus detection in the placenta and therefore these numbers were not included for the meta-analysis (##).