Table 3.

Child sex distribution for maternal ABO blood type and lesion level

Blood type	Upper lesion		Lower lesion		Totals		% Female*
	Male	Female	Male	Female	Male	Female
A	19	24	19	16	38	40	51.3%
B	4	3	8	14	12	17	58.6%
AB	3	4	4	7	7	11	61.1%
O	12	22	24	38	36	60	62.5%
Totals	38	53	55	75	93	128
% Female†	58.2%		57.7%

^*Percents calculated on blood type total counts.

^†Percents calculated on lesion total counts.