Average Weight Gain, Number and Percent of Singleton Live Births
by Recommended Maternal Weight Gain¹, and Mother's BMI² at Start of Pregnancy,
Tables for Race, Hispanic or Middle Easterner Ancestry
Michigan Residents, 2022

Total Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	33.5	2,708	2.8	953	4.5	1,056	3.7	684	1.5
18.5 - 24.9 Desirable	33.0	37,037	38.1	9,839	46.4	12,818	45.1	14,106	30.0
25.0 - 29.9 Overweight	30.5	25,911	26.6	3,607	17.0	6,846	24.1	15,281	32.5
≥30.0 Obese	24.0	31,650	32.5	6,814	32.1	7,693	27.1	16,974	36.1
Total	29.4	97,306	100.0	21,213	100.0	28,413	100.0	47,045	100.0

White Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	33.8	1,874	2.6	622	4.3	755	3.6	488	1.4
18.5 - 24.9 Desirable	33.6	28,210	39.5	6,852	47.3	10,015	47.7	11,132	31.4
25.0 - 29.9 Overweight	31.3	19,059	26.7	2,352	16.2	4,839	23.1	11,747	33.1
≥30.0 Obese	24.2	22,254	31.2	4,657	32.2	5,381	25.6	12,125	34.2
Total	30.0	71,397	100.0	14,483	100.0	20,990	100.0	35,492	100.0

Black Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	33.8	560	3.2	217	4.8	193	4.1	148	1.8
18.5 - 24.9 Desirable	32.1	5,280	29.9	1,788	39.8	1,535	32.3	1,926	23.1
25.0 - 29.9 Overweight	29.5	4,399	24.9	753	16.8	1,233	26.0	2,384	28.7
≥30.0 Obese	24.0	7,447	42.1	1,730	38.5	1,788	37.7	3,862	46.4
Total	28.1	17,686	100.0	4,488	100.0	4,749	100.0	8,320	100.0

Asian & Pacific Islander Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	30.5	176	4.3	69	5.9	78	5.3	26	1.8
18.5 - 24.9 Desirable	29.4	2,146	51.9	730	62.8	829	56.3	564	38.9
25.0 - 29.9 Overweight	25.2	1,194	28.9	244	21.0	372	25.3	562	38.7
≥30.0 Obese	21.8	617	14.9	120	10.3	194	13.2	299	20.6
Total	27.1	4,133	100.0	1,163	100.0	1,473	100.0	1,451	100.0

Native American Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	33.9	27	2.8	8	3.9	10	3.9	9	1.8
18.5 - 24.9 Desirable	35.9	344	35.4	74	35.9	107	41.5	160	31.7
25.0 - 29.9 Overweight	31.5	246	25.3	47	22.8	53	20.5	145	28.7
≥30.0 Obese	24.2	356	36.6	77	37.4	88	34.1	191	37.8
Total	30.5	973	100.0	206	100.0	258	100.0	505	100.0

Hispanic Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	31.9	140	2.0	58	3.4	48	2.3	33	1.1
18.5 - 24.9 Desirable	31.6	2,168	31.7	690	40.7	729	35.6	736	24.1
25.0 - 29.9 Overweight	27.8	1,983	29.0	362	21.4	606	29.6	1,005	32.9
≥30.0 Obese	22.6	2,543	37.2	584	34.5	666	32.5	1,279	41.9
Total	27.2	6,834	100.0	1,694	100.0	2,049	100.0	3,053	100.0

Middle Easterner Singleton Live Births

Initial Body Mass Index (BMI) and IOM Classification	Average Weight Gain (lbs)	Singleton Live Births 3		Below Recommended Maternal Weight Gain		Recommended Maternal Weight Gain		Above Recommended Maternal Weight Gain
		Number	Percent	Number	Percent	Number	Percent	Number	Percent
<18.5  Underweight	31.3	147	3.4	66	5.8	47	3.6	33	1.7
18.5 - 24.9 Desirable	31.7	1,895	43.2	608	53.8	602	46.7	679	34.8
25.0 - 29.9 Overweight	28.1	1,383	31.6	272	24.0	401	31.1	708	36.3
≥30.0 Obese	25.1	958	21.9	185	16.4	238	18.5	533	27.3
Total	29.1	4,383	100.0	1,131	100.0	1,288	100.0	1,953	100.0

Notes:

1The 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 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       2This table uses BMI categories defined by the World Health Organization (1995), and recommended for application to weight gain tables by the IOM in 2009. 3Numbers 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.

Source:

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