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, 2023

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	35.0	2,592	2.8	846	4.2	970	3.7	758	1.6
18.5 - 24.9 Desirable	33.4	35,491	37.9	9,307	46.2	11,914	45.2	13,949	30.0
25.0 - 29.9 Overweight	31.0	24,768	26.4	3,485	17.3	6,192	23.5	14,908	32.1
≥30.0 Obese	24.5	30,803	32.9	6,527	32.4	7,254	27.6	16,834	36.2
Total	29.9	93,654	100.0	20,165	100.0	26,330	100.0	46,449	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	35.6	1,807	2.6	540	4.0	703	3.6	551	1.6
18.5 - 24.9 Desirable	34.0	27,152	39.3	6,450	47.6	9,395	47.9	11,058	31.3
25.0 - 29.9 Overweight	31.8	18,391	26.6	2,218	16.4	4,461	22.7	11,587	32.8
≥30.0 Obese	24.8	21,679	31.4	4,356	32.1	5,072	25.8	12,121	34.3
Total	30.6	69,029	100.0	13,564	100.0	19,631	100.0	35,317	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	32.6	487	3.0	202	4.7	158	3.8	126	1.6
18.5 - 24.9 Desirable	32.3	4,851	29.4	1,663	38.3	1,319	31.5	1,831	23.3
25.0 - 29.9 Overweight	29.7	4,049	24.5	786	18.1	1,020	24.4	2,208	28.1
≥30.0 Obese	24.2	7,109	43.1	1,692	39.0	1,690	40.4	3,682	46.9
Total	28.1	16,496	100.0	4,343	100.0	4,187	100.0	7,847	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	33.1	184	4.4	71	5.8	78	5.6	35	2.3
18.5 - 24.9 Desirable	29.7	2,164	51.8	743	61.1	785	56.3	617	40.3
25.0 - 29.9 Overweight	25.3	1,243	29.7	263	21.6	402	28.8	564	36.8
≥30.0 Obese	22.2	590	14.1	139	11.4	129	9.3	316	20.6
Total	27.5	4,181	100.0	1,216	100.0	1,394	100.0	1,532	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	50.9	28	2.9	3	*	5	*	18	3.3
18.5 - 24.9 Desirable	35.3	304	31.7	73	38.6	86	38.6	142	26.3
25.0 - 29.9 Overweight	33.6	218	22.7	23	12.2	51	22.9	143	26.5
≥30.0 Obese	25.6	409	42.6	90	47.6	81	36.3	236	43.8
Total	31.2	959	100.0	189	100.0	223	100.0	539	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	36.5	176	2.5	51	2.9	57	2.8	65	2.0
18.5 - 24.9 Desirable	31.2	2,260	31.7	756	42.8	710	35.0	778	23.7
25.0 - 29.9 Overweight	27.8	2,024	28.4	377	21.4	615	30.3	1,019	31.0
≥30.0 Obese	23.4	2,668	37.4	581	32.9	647	31.9	1,423	43.3
Total	27.5	7,128	100.0	1,765	100.0	2,029	100.0	3,285	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	30.6	122	2.8	57	4.9	43	3.4	22	1.2
18.5 - 24.9 Desirable	31.6	1,877	43.2	605	52.0	612	47.9	652	34.5
25.0 - 29.9 Overweight	27.4	1,365	31.4	282	24.2	391	30.6	690	36.5
≥30.0 Obese	24.2	978	22.5	220	18.9	232	18.2	524	27.8
Total	28.6	4,342	100.0	1,164	100.0	1,278	100.0	1,888	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:

2023 Michigan Resident Birth Files, Division for Vital Records & Health Statistics, Michigan Department of Health & Human Services.