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, 2018

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
2,8822.81,0171,15569435.340.124.1
18.5 - 24.9
Desirable
40,83939.910,66915,09514,87126.137.036.4
25.0 - 29.9
Overweight
27,10626.53,4567,36316,07912.727.259.3
>30.0
Obese
31,54530.86,6478,10016,47421.125.752.2
Total 102,372100.021,78931,71348,11821.331.047.0

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
1,9532.664681748133.141.824.6
18.5 - 24.9
Desirable
31,11341.57,42711,85011,71423.938.137.6
25.0 - 29.9
Overweight
20,00026.72,3555,25612,27911.826.361.4
>30.0
Obese
21,95629.34,6065,41311,77621.024.753.6
Total 75,022100.015,03423,33636,25020.031.148.3
 

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
5903.023219415739.332.926.6
18.5 - 24.9
Desirable
5,97730.81,9311,7722,21232.329.637.0
25.0 - 29.9
Overweight
4,95525.57051,3682,80514.227.656.6
>30.0
Obese
7,89540.71,6772,1433,92721.227.149.7
Total 19,417100.04,5455,4779,10123.428.246.9

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
2566.01071113841.843.414.8
18.5 - 24.9
Desirable
2,49958.388199261335.339.724.5
25.0 - 29.9
Overweight
1,08825.418939648917.436.444.9
>30.0
Obese
44210.38514121019.231.947.5
Total 4,285100.01,2621,6401,35029.538.331.5
 

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
142.4446**42.9
18.5 - 24.9
Desirable
21436.052778524.336.039.7
25.0 - 29.9
Overweight
15726.423409314.625.559.2
>30.0
Obese
21035.3486010222.928.648.6
Total 595100.012718128621.330.448.1
 

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
1422.058602440.842.316.9
18.5 - 24.9
Desirable
2,25431.976981765834.136.229.2
25.0 - 29.9
Overweight
2,10529.84126751,01119.632.148.0
>30.0
Obese
2,57336.46327841,14724.630.544.6
Total 7,074100.01,8712,3362,84026.433.040.1

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
Below Recom-mended Above Below Recom-
mended
Above
<18.5
 Underweight
1783.279602344.433.712.9
18.5 - 24.9
Desirable
2,43243.881269572133.428.629.6
25.0 - 29.9
Overweight
1,65829.820257667212.234.740.5
>30.0
Obese
1,29023.217235543913.327.534.0
Total 5,558100.01,2651,6861,85522.830.333.4

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
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:

2018 Michigan Resident Birth Files, Division for Vital Records & Health Statistics, Michigan Department of Health & Human Services.