Variable	Category	Cases		Controls
Variable	Category	Absolute number	Percentage	Absolute number	Percentage
Parity	Primiparous	12	19.7	24	19.7
Parity	Multiparous	49	80.3	98	80.3
Pregnancy (weeks) at	<14 weeks	3	4.9	0	0
Pregnancy (weeks) at	15 - 28 weeks	7	11.5	2	1.6
diagnosis	28 - 36 weeks	24	39.3	16	13.2
diagnosis	≥37 weeks	27	44.3	104	85.2
Number of ANCS done	<8	42	68.9	90	73.8
Number of ANCS done	>8	19	31..3	32	26.2