Table 1.

Maternal and Paternal Demographic Characteristics by Maternal Fertility Group

		All	Fertile	Subfertile	IVF
	N, pregnancies	459,623	441,420	8,054	10,149
Maternal	Mean (SD)	29.5 (6.1)	29.3 (6.1)	34.8 (4.6)	35.9 (4.6)
Age (years)	(%) <35	77.7	79.2	45.4	39.1
	35–37	13.0	12.5	26.2	24.9
	38–40	6.7	6.1	18.3	20.4
	41–42	1.8	1.5	6.7	8.7
	≥43	0.8	0.7	3.4	6.9
Paternal	Mean (SD)	32.5 (6.8)	32.3 (6.7)	36.9 (5.5)	37.9 (5.8)
Age (years)	(%) <35	62.5	63.9	33.5	29.0
	35–37	16.0	15.6	24.2	23.2
	38–40	10.5	10.1	20.0	19.9
	41–42	4.3	4.0	8.5	9.4
	≥43	6.8	6.4	13.8	18.7
Maternal Race	Hispanic	14.5	14.9	4.5	3.4
& Ethnicity (%)	White	67.0	66.3	84.3	85.0
	Black	8.7	9.0	3.2	3.2
	Asian	7.7	7.7	6.9	7.4
	Other	2.1	2.2	1.1	1.0
Paternal Race	Hispanic	14.0	14.4	4.3	3.0
& Ethnicity (%)	White	68.0	67.2	85.3	86.6
	Black	8.9	9.1	3.6	3.4
	Asian	7.2	7.3	6.1	6.1
	Other	2.0	2.0	0.9	0.9
Maternal	<HS or HS/GED	36.7	37.8	11.9	9.4
Education (%)*	Some Coll.	21.3	21.5	17.7	15.4
	BS or Graduate	42.0	40.7	70.4	75.3
Paternal	<HS or HS/GED	41.3	42.4	19.6	16.1
Education (%)*	Some Coll.	17.3	17.4	15.1	13.8
	BS or Graduate	41.4	40.2	65.3	70.1
Maternal	Yes	7.3	7.6	1.8	0.7
Smoking (%)	No	92.7	92.4	98.2	99.3
Payor	Private	58.3	56.8	90.0	95.1
Source (%)	Public	40.3	41.7	8.3	3.1
	Self-pay or Free	1.5	1.5	1.6	1.7

^*< High School or High School/GED; Some College or Associate Degree; Bachelor Degree or Post-Graduate

All comparisons across fertility groups were significant at p<0.0001