Percent of Singleton Births by Mother's BMI at Start of Pregnancy,
and Maternal Weight Gain by Percent of Mother's BMI Classification¹,
By Race and Hispanic or Middle Easterner Ancestry,
Michigan Residents, 2022

Total Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	2,708	2.8	953	1,056	684	35.2	39.0	25.3
18.5 - 24.9 Desirable	37,037	38.1	9,839	12,818	14,106	26.6	34.6	38.1
25.0 - 29.9 Overweight	25,911	26.6	3,607	6,846	15,281	13.9	26.4	59.0
>30.0 Obese	31,650	32.5	6,814	7,693	16,974	21.5	24.3	53.6

Total	97,306	100.0	21,213	28,413	47,045	21.8	29.2	48.3

White Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	1,874	2.6	622	755	488	33.2	40.3	26.0
18.5 - 24.9 Desirable	28,210	39.5	6,852	10,015	11,132	24.3	35.5	39.5
25.0 - 29.9 Overweight	19,059	26.7	2,352	4,839	11,747	12.3	25.4	61.6
>30.0 Obese	22,254	31.2	4,657	5,381	12,125	20.9	24.2	54.5

Total	71,397	100.0	14,483	20,990	35,492	20.3	29.4	49.7

Black Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	560	3.2	217	193	148	38.8	34.5	26.4
18.5 - 24.9 Desirable	5,280	29.9	1,788	1,535	1,926	33.9	29.1	36.5
25.0 - 29.9 Overweight	4,399	24.9	753	1,233	2,384	17.1	28.0	54.2
>30.0 Obese	7,447	42.1	1,730	1,788	3,862	23.2	24.0	51.9

Total	17,686	100.0	4,488	4,749	8,320	25.4	26.9	47.0

Asian & Pacific Islander Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	176	4.3	69	78	26	39.2	44.3	14.8
18.5 - 24.9 Desirable	2,146	51.9	730	829	564	34.0	38.6	26.3
25.0 - 29.9 Overweight	1,194	28.9	244	372	562	20.4	31.2	47.1
>30.0 Obese	617	14.9	120	194	299	19.4	31.4	48.5

Total	4,133	100.0	1,163	1,473	1,451	28.1	35.6	35.1

Native American Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	27	2.8	8	10	9	29.6	37.0	33.3
18.5 - 24.9 Desirable	344	35.4	74	107	160	21.5	31.1	46.5
25.0 - 29.9 Overweight	246	25.3	47	53	145	19.1	21.5	58.9
>30.0 Obese	356	36.6	77	88	191	21.6	24.7	53.7

Total	973	100.0	206	258	505	21.2	26.5	51.9

Hispanic Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	140	2.0	58	48	33	41.4	34.3	23.6
18.5 - 24.9 Desirable	2,168	31.7	690	729	736	31.8	33.6	33.9
25.0 - 29.9 Overweight	1,983	29.0	362	606	1,005	18.3	30.6	50.7
>30.0 Obese	2,543	37.2	584	666	1,279	23.0	26.2	50.3

Total	6,834	100.0	1,694	2,049	3,053	24.8	30.0	44.7

Middle Easterner Singleton Live Births

Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Maternal Weight Gain Grouped by IOM Guidelines³			Maternal Weight Gain as Percent of BMI Classification
Initial Body Mass Index (BMI) and (IOM Classification)	Singleton Births²	Percent of Singleton Births	Below	Recom-mended	Above	Below	Recom- mended	Above
<18.5 Underweight	161	3.2	66	47	33	41.0	29.2	20.5
18.5 - 24.9 Desirable	2,163	43.2	608	602	679	28.1	27.8	31.4
25.0 - 29.9 Overweight	1,558	31.1	272	401	708	17.5	25.7	45.4
>30.0 Obese	1,125	22.5	185	238	533	16.4	21.2	47.4

Total	5,007	100.0	1,131	1,288	1,953	22.6	25.7	39.0

Notes:

¹This table uses BMI categories defined by the World Health Organization (1995), and recommended for application to weight gain tables by the IOM in 2009.

²Numbers are counts of singleton live births with reported pre-pregnancy BMI. Other counts are for mothers of singleton live births, with known BMI and weight gain figures.

³The Institute of Medicine (IOM) defines recommended weight gain during pregnancy according to the following table:

Institute of Medicine (IOM) Pre-pregnancy BMI Classification &
Recommended Total Weight Gain During Pregnancy
BMI Classification	Weight Gain
BMI Classification	Pounds	Kilograms
Underweight	28-40	12.5-18
Desirable	25-35	11.5-16
Overweight	15-25	7.0-11.5
Obese	11-20	5-9

Source:

2022 Michigan Resident Birth Files, Division for Vital Records & Health Statistics, Michigan Department of Health & Human Services.

Percent of Singleton Births by Mother's BMI at Start of Pregnancy, and Maternal Weight Gain by Percent of Mother's BMI Classification1, By Race and Hispanic or Middle Easterner Ancestry, Michigan Residents, 2022