THE ALARMING IMBALANCE OF SEX RATIO AT BIRTH IN

CHI LINH, HAIDUONG PROVINCE, VIETNAM

2005 – 2010

Presenter Nguyen Thanh Ha

Content

• Introduction

• Methodology

• Results

• Discussion

• Recommendation

Introduction

• Sex ratio at birth: Statistical indicator computed as: The number of boys being born per one hundred girls (UNFPA).

• Normal SBR: 104-106 boys every 100 girls • Important demographic indicator

– Doubling-time of population– Critical demographic measures– Trends in infant morbidity (low birth weight,

mortality male infants…)

Methodology

• A part of CHILILAB database• Fertility, Mortality, Marriage, Migrants,

SES and basis Health Information.• Every 6 months from 2003 to date• Births from 2005-2010• Merge with parental information and

preceding child/children• Analyze: descriptive and linear and

multiple regression

Results

Results

Results

73.0

96.8

117.3 117.5

84.5

98.9

138.2

113.7

131.5143.0

133.3 131.3

60

80

100

120

140

160

2005 2006 2007 2008 2009 2010

Year

SBR

First born is boy First born is girl General SBR

Figure 2: Sex ratio at birth by the sex of previous child/children

Results

Discussion

• 2005 – 2008, SBR is 112.3, equivalently to the national rate (111/100 – VPHC, 2009)

• Parents choose sex of child (boy) at the first child (114/100) or the 3th one and above (176/100)

• SBR is highly related to the sex of preceding child/children, mother’s education, occupation and SES.

Recommendation

• To researchers:

• To local policy makers:

• To community: