Table 1.

Clinical characteristics of the pregnant women.

Group of Pregnant Women 1	AIP	Scar on the Uterus	Placenta Previa	Age 2	Number of Pregnancies in History 2	Number of Previous Cesarean Sections 2
I (n = 10)	abs	yes	no	36.5 (33; 39)	3 (3; 3.8)	1 (1; 1.8)
IIa (n = 9)	abs	no	yes	36 (36; 39)	3 (1; 3)	0 (0; 0) **
IIb (n = 8)	abs	yes	yes	37.5 (34; 38.3)	3 (2.8; 6.3)	2 (1; 2.3)
III (n = 10)	accreta	yes	yes	34 (33; 35.8)	4 (3.3; 5)	2 (2; 3) *
IV (n = 20)	increta	yes	yes	33 (29.5; 36.3)	4 (3; 5)	2 (1; 2)
V (n = 7)	percreta	yes	yes	33 (32; 33)	4 (2.5; 4)	2 (1.5; 2)

¹ Roman numerals indicate the group number; the size of the group is indicated in brackets. ² Data are presented as the median (Me) and quartiles Q1 and Q3 in the format: Me (Q1; Q3). * The value of statistical significance of differences when compared to group I is less than 0.05. ** The value of statistical significance of differences when compared to group I is less than 0.0001.