The purpose of this study is to observe the effect of lack or excess of Vitamin D in the first, second and third trimester on child birth weight, fat content and the secretion of metabolism related hormone, and clinical follow-up their offspring obesity.
Study Type
OBSERVATIONAL
Enrollment
30,000
Nanjing Maternal and Child Health Care Hospital Affiliated to Nanjing Medical University
Nanjing, Jiangsu, China
The level of Vitamin D of pregnancy women at second trimester
Time frame: 20-24 weeks of pregnancy
The level of Vitamin D of pregnancy women at first trimester
Time frame: 12 weeks of pregnancy
The level of Vitamin D of pregnancy women at third trimester
Time frame: 28-40 weeks of pregnancy
The birth weight, fat content and metabolism related hormone secretion of their offspring
Time frame: At birth
The weight, fat content and metabolism related hormone secretion of their offspring at one year old
Time frame: One years old
The weight, fat content and metabolism related hormone secretion of their offspring at 3 years old
Time frame: 3 years old
The weight, fat content and metabolism related hormone secretion of their offspring at 5-7 years old
Time frame: 5-7 years old
The weight, fat content and the secretion of metabolism related hormone of offspring at 18 years old
Time frame: 18 years old
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