Mode of onset of Labor	GA at onset of Labor/Induction	Cervical Length				Total	Mean cervical length
Mode of onset of Labor	GA at onset of Labor/Induction	<2 cm	2 - 2.9 cm	3 - 3.9 cm	≥4 cm	Total	Mean cervical length
Spontaneous	<37 wks	3	14	6	0	23	3.11 ± 0.85 cm
	37 - 40 wks	0	3	14	6	23
	>40 wks	0	0	0	0	0
	Total	3	17	20^**	6^****	46
Induced	<37 wks	0	0	1	0	1	4.36 ± 1.11 cm
	37 - 40 wks	0	1	17	16	24
	>40 wks	0	1	8	10	19
	Total	0	2	26^**	26^****	54
TOTAL		3	19*	46^/*	32^**	100