Table 4.

Analysis of B19 vertical transmission in relation to the trimester of documented maternal infection^a

Maternal B19 infection	Total no. (%) of pregnancies	No. (%) of pregnancies with vertical transmission	No. (%) of various pregnancy outcomes
First trimester	23/59 (38.98)	8/23 (34.78)	6/8 (75) at term
			2/8 (25) miscarriages
Second trimester (<20 wks)	14/59 (23.73)	8/14 (57.14)	6/8 (75) at term
			2/8 (25) IUFDs
Second trimester (>20 wks)	13/59 (22.03)	3/13 (23.07)	3/3 (100) at term
Third trimester	9/59 (15.25)	4/9 (44.44)	4/4 (100) at term
Total	59/59 (100)	23/59 (38.98)	19/23 (82.61) at term
			4/23 (17.39) fetal loss

^aIUFD, intrauterine fetal death.