Sex Ratio at Birth and its Determinants: A Cross Sectional Hospital Based Study
Keywords:
Sex ratio, sex ration at birth, birth orderAbstract
Introduction: Sex ratio is used to reflect gender equity of the population. Sex ratio in India has shown an upward trend since Census 1991 but during the same period, child sex ratio (0-6 years) has shown a declining trend. Sex ratio at birth affects child sex ratio. This study was planned to determine the sex ratio at birth among deliveries conducted in a government tertiary care hospital of Kumaon region of Uttarakhand.
Materials and Methods: A cross-sectional hospital based study conducted in tertiary care centre of Nainital district. Partcipants were selected using systematic random sampling. A pre-tested and pre-structured questionnaire was used to collect information. Data analysed using SPSS version 17 and is presented as numbers, percentages and ratios.
Results: Sex ratio at birth was 852 girls to 1000 boys. The highest sex ratio of 1059 was found among the first birth order offsprings which declined to 897,654 and 619 as the birth order increased to second, third and fourth respectively. Sex ratio at birth in rural population was higher (953) than in urban (752). Sex ratio at birth among literate mothers was 857 and in illiterate mothers it was 829.
Conclusion: Sex ratio at birth increased with advancing maternal age and literacy status of females whereas it decreased with increase in birth order and number of live females in the families.
References
Child sex ratio in India. Available fromhttp://www.actionaid.org/sites/files/actionaid/child_sex_ratio_-_presentati- on_by_census_commissioner.pdf. Accessed on 02 January 2017.
Hesketh T, Xing WZ. Abnormal sex ratio in human popula-tions: causes and consequences. ProcNatlAcadSci, USA. 2006;103(36):13271-75.
Markle GE. Sex ratio at birth: values, variance, and some determinants. Demography. 1974;11:131-42.
Stevenson DK, Verter J, Fanaroff AA, Oh W, Ehrenkranz RA, Shankaran S, et al. Sex differences in outcomes of very low birthweight infants: the newborn male disadvantage. Arch Dis Child Fetal Neonatal Ed. 2000;83:182-5.
Getahun D, Amre D, Rhoads GG, Demissie K. Maternal and obstetric risk factors for sudden infant death syndrome in the United States. Obstet Gynecol. 2004;103(4):646-52.
Davis DL, Gottlieb M, Stampnitzky J. Reduced ratio of male to female births in several industrial countries: a sentinel health indicator?.JAMA. 1998;279(13):1018-23.
Yoshimura T, Kaneko S, Hayabuchi H. Sex ratio in offspring of those affected by doxin and doxin-like compounds: the Yucho, Seveso, and Yucheng incidents. Occup Environ Med. 2001;58:540-1.
Toppari J, Shakkebaek NE. Sexual differentiation and envi-ronmental endocrine disrupters. BaillieresClinEndo-crinolMetab. 1998;12:143-56.
Martuzzi M, Di Tanno ND, Bertollini R. Declining trends of male proportion at birth in Europe. Arch Environ Health. 2001;56:358-64.
Mizuno R. The male/female ratio of fetal deaths and births in Japan. Lancet 2000;356:738-9.
Mathews TJ, Hamilton BE. Trend analysis of the sex ratio at birth in the United States.National vital statistics reports. 2005 Jun 14;53(20):1-7.
James WH. Offspring sex ratios at birth as markers of pater-nal endocrine disruption. Environ Res. 2006;100:77-85.
Grech V, Vassallo-Agius P, Savona-Ventura C. Secular trends in sex ratio at birth in North America and Europe over the second half of the 20th century. J EpidemiolComm Health.2003; 57:612-5.
National Family Health Survey -4 2015-16. State fact sheet Uttarakhand. Available from http://rchiips.org/nfhs/pdf/ NFHS4/UT_FactSheet.pdf.Accessed on 02 January 2017.
Toppo M, Diwakar A, Pal DK. A study of sex ratio in rela-tion to birth order in Bhopal city.Healthline, Journal of Indi-an Association of Preventive and Social Medicine. 2012;3(1):45-9.
Jha P, Kumar R, Vasa P, Dhingra N, Thiruchelvam D, Moineddin R. Low male-to-female sex ratio of children born in India: national survey of 1· 1 million households. The Lancet. 2006 Jan 27;367(9506):211-8..
OnyiriukaAN, IkeanyiEM. Sex Ratio at Birth: A Retrospec-tive Audit of the Birth Records of a Nigerian Hospital.NJOG 2015 Jan-Jun; 19 (1):85-88
Rueness J, Vatten L, Eskild A. The human sex ratio: effects of maternal age. Hum Reprod. 2012;27(1):283-7.
Maconochie N, Roman E. Sex ratio: are there natural varia-tions within the human population?.Brit J ObstetGynaecol. 1997;104:1050-3.
Anandita Dawn and RanjanBasu. Fluctuation of sex ratio in India with special reference to West Bengal.International Journal of Recent Scientific Research 2015; 6 (5): 3796-3801.
Branum A, Parker J, Schoendorf K. Trends in US sex ratio by plurality, gestational age, and race/ethnicity. Hum Reprod. 2009;24(11):2936-44.
Orvos H, Kozinsky Z, Bartfai G. Natural variation in the human sex ratio. Hum Reprod. 2001;16:803.
Nixon NN. Maternal age at birth delivery, birth order and secondary sex ratio in the Old Order Amish of Lancaster County. MSc Thesis submitted to the Graduate School of the University of Massachusetts, Amherst, 2013.
James WH. Sex ratio of offspring and the causes of placental pathology. Hum Reprod. 1995;10:1405-6.
Novitski E, Kimball AW. Birth order, parental ages, and sex of offspring.Am J Hum Genet. 1958;10(3):268-75.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
The authors retain the copyright of their article, with first publication rights granted to Medsci Publications.