Complete Indicator Profile of Birth Outcomes: Sex Ratio at Birth

Definition

The ratio of total males/total females born in a geographic area at a certain time.

Numerator

The total number of full-term, singleton male infants born in a specified geographic area during and time period.

Denominator

The total number of full-term, singleton female infants born in a specified geographic area during and time period.

Why Is This Important?

Population growth is, in part, related to the number of live male children. Numerous studies have reported changes in the ratio of males to females at birth; many of the studies have found a reduction in male relative to female births in different countries throughout the world. Although the mechanism which determines the sex of the infant is not completely understood, some, but not all, have suggested that environmental hazards can affect how many males are born. Biological parent(s) and/or the fetus can come in contact with and become exposed to different hazards referred to as endocrine disruptors. Fewer males are conceived when exposure to endocrine disruptors results in a decrease in testosterone. Because states have accurate Vital Statistics (VS) records on the sex of live births, changes over time in the sex ratio of infants can be measured as the ratio of males to females.

Other Objectives

CDC Environmental Public Health Tracking, Nationally Consistent Data and Measures (EPHT NCDM)



Graphical Data Views

Male to Female Sex Ratio at Birth (Term Singletons Only) by County, New Mexico 2010

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County Lower Limit Upper Limit Note Numerator Denominator
Bernalillo 103.8 99.6 108 4,375 4,214
Catron 216.7 119.9 313.4 13 6
Chaves 102.9 90.4 115.4 500 486
Cibola 101.9 82.8 121.1 211 207
Colfax 130 96.3 163.7 78 60
Curry 112.3 99.4 125.1 494 440
De Baca 127.3 48.3 206.2 Warning, small numbers, statistic not stable' 14 11
Dona Ana 108.6 101.8 115.4 1,730 1,593
Eddy 100.8 86.3 115.4 366 363
Grant 123.3 102.4 144.2 196 159
Guadalupe 84 26 142 'Warning, small numbers, statistic not stable' 21 25
Harding 50 290 'Warning, small numbers, statistic not stable' 1 2
Hidalgo 143.8 79.9 207.6 23 16
Lea 99.2 87.1 111.4 520 524
Lincoln 100 71.6 128.4 95 95
Los Alamos 84.7 55.5 113.9 83 98
Luna 124.7 104.3 145.1 207 166
McKinley 109.7 98.6 120.9 653 595
Mora 91.3 32.2 150.5 'Warning, small numbers, statistic not stable' 21 23
Otero 101.8 88.6 115.1 441 433
Quay 118 80.3 155.7 59 50
Rio Arriba 89.1 73.3 104.8 293 329
Roosevelt 116.4 93.8 139 163 140
Sandoval 98.1 88.2 108 782 797
San Juan 105.1 96.2 114 988 940
San Miguel 102.4 81.2 123.6 173 169
Santa Fe 98.3 88.2 108.4 749 762
Sierra 79.6 39.6 119.7 43 54
Socorro 108.1 83.6 132.6 133 123
Taos 109.6 87.9 131.3 171 156
Torrance 120.3 89.4 151.1 89 74
Union 117.4 61.8 173 27 23
Valencia 110 97.2 122.7 496 451
NM 104.6 102.2 107 14,209 13,585
Record Count: 34


Male to Female Sex Ratio at Birth (Term Singletons Only) by Year, New Mexico 1990-2010

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New Mexico vs. U.S. Year Males per 100 Females Lower Limit Upper Limit Numerator Denominator
New Mexico 1990 103 100.6 105.4 13,859 13,458
New Mexico 1991 102 99.6 104.3 14,029 13,755
New Mexico 1992 102.9 100.5 105.2 14,151 13,756
New Mexico 1993 102.7 100.4 105.1 14,102 13,729
New Mexico 1994 103.6 101.2 106 14,036 13,550
New Mexico 1995 102.3 99.9 104.7 13,610 13,304
New Mexico 1996 103.1 100.7 105.4 13,812 13,403
New Mexico 1997 103.4 101 105.8 13,645 13,199
New Mexico 1998 102.8 100.4 105.2 13,777 13,405
New Mexico 1999 104 101.6 106.4 13,765 13,238
New Mexico 2000 104 101.6 106.3 13,785 13,260
New Mexico 2001 103.4 101 105.8 13,721 13,268
New Mexico 2002 101.4 99 103.7 13,909 13,719
New Mexico 2003 102.8 100.4 105.2 13,981 13,601
New Mexico 2004 105.1 102.8 107.4 14,481 13,777
New Mexico 2005 103.1 100.8 105.4 14,581 14,141
New Mexico 2006 105 102.7 107.3 15,323 14,594
New Mexico 2007 105.6 103.4 107.8 15,719 14,886
New Mexico 2008 103.5 101.2 105.8 15,337 14,819
New Mexico 2009 103.9 101.6 106.2 14,710 14,163
New Mexico 2010 104.6 102.2 107 14,209 13,585
Record Count: 21

Data Sources

Birth Certificate Data, Bureau of Vital Records and Health Statistics (BVRHS), New Mexico Department of Health.


Page Content Updated On 06/28/2012, Published on 06/28/2012
Environmental Health Epidemiology Bureau, Environmental Public Health Tracking Program, New Mexico Department of Health, 1190 St Francis Drive, Suite 1320, Santa Fe, NM 87505, Heidi Krapfl, Chief, (505) 476-3577, heidi.krapfl@state.nm.us, or Brian Woods, Environmental Epidemiologist, (505) 827-2868, brian.woods@state.nm.us
The information provided above is from the New Mexico Department of Health's NM-IBIS web site (http://ibis.health.state.nm.us). The information published on this website may be reproduced without permission. Please use the following citation: "Retrieved Wed, 19 June 2013 1:03:22 from New Mexico Department of Health, Indicator-Based Information System for Public Health Web site: http://ibis.health.state.nm.us".

Content updated: Wed, 11 Jul 2012 09:17:00 MDT