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	2,686	2.8	949	1,043	680	35.3	38.8	25.3
18.5 - 24.9 Desirable	36,467	38.0	9,686	12,628	13,883	26.6	34.6	38.1
25.0 - 29.9 Overweight	25,509	26.6	3,562	6,752	15,020	14.0	26.5	58.9
>30.0 Obese	31,218	32.6	6,717	7,590	16,744	21.5	24.3	53.6

Total	95,880	100.0	20,914	28,013	46,327	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	1,857	2.6	620	744	484	33.4	40.1	26.1
18.5 - 24.9 Desirable	27,694	39.5	6,718	9,843	10,926	24.3	35.5	39.5
25.0 - 29.9 Overweight	18,689	26.7	2,316	4,751	11,503	12.4	25.4	61.5
>30.0 Obese	21,862	31.2	4,574	5,285	11,914	20.9	24.2	54.5

Total	70,102	100.0	14,228	20,623	34,827	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	558	3.2	216	192	148	38.7	34.4	26.5
18.5 - 24.9 Desirable	5,248	29.8	1,775	1,525	1,917	33.8	29.1	36.5
25.0 - 29.9 Overweight	4,385	24.9	747	1,230	2,379	17.0	28.1	54.3
>30.0 Obese	7,419	42.1	1,718	1,785	3,849	23.2	24.1	51.9

Total	17,610	100.0	4,456	4,732	8,293	25.3	26.9	47.1

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	174	4.2	68	77	26	39.1	44.3	14.9
18.5 - 24.9 Desirable	2,142	52.0	729	828	562	34.0	38.7	26.2
25.0 - 29.9 Overweight	1,187	28.8	242	372	557	20.4	31.3	46.9
>30.0 Obese	614	14.9	120	192	298	19.5	31.3	48.5

Total	4,117	100.0	1,159	1,469	1,443	28.2	35.7	35.0

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	342	35.4	73	106	160	21.3	31.0	46.8
25.0 - 29.9 Overweight	246	25.5	47	53	145	19.1	21.5	58.9
>30.0 Obese	351	36.3	77	87	187	21.9	24.8	53.3

Total	966	100.0	205	256	501	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	141	2.1	59	48	33	41.8	34.0	23.4
18.5 - 24.9 Desirable	2,141	31.7	683	718	727	31.9	33.5	34.0
25.0 - 29.9 Overweight	1,960	29.0	357	599	994	18.2	30.6	50.7
>30.0 Obese	2,514	37.2	573	659	1,268	22.8	26.2	50.4

Total	6,756	100.0	1,672	2,024	3,022	24.7	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	160	3.2	66	47	33	41.3	29.4	20.6
18.5 - 24.9 Desirable	2,159	43.2	608	602	679	28.2	27.9	31.4
25.0 - 29.9 Overweight	1,556	31.1	272	401	708	17.5	25.8	45.5
>30.0 Obese	1,123	22.5	185	238	533	16.5	21.2	47.5

Total	4,998	100.0	1,131	1,288	1,953	22.6	25.8	39.1

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