Clausson, Britt; Lichtenstein, Paul; Cnattingius, Sven (tháng 3 năm 2000). “Genetic influence on birthweight and gestational length determined by studies in offspring of twins”. BJOG: An International Journal of Obstetrics and Gynaecology. 107 (3): 375–381. doi:10.1111/j.1471-0528.2000.tb13234.x. ISSN1470-0328.
DefinitionsLưu trữ 2012-04-02 tại Wayback Machine from Georgia Department of Public Health. Date: 12/04/2008. Original citation: "Birthweight: Infant's weight recorded at the time of birth"
DefinitionsLưu trữ 2012-04-02 tại Wayback Machine from Georgia Department of Public Health. Date: 12/04/2008. Original citation: "Birthweight: Infant's weight recorded at the time of birth"
Clausson, Britt; Lichtenstein, Paul; Cnattingius, Sven (tháng 3 năm 2000). “Genetic influence on birthweight and gestational length determined by studies in offspring of twins”. BJOG: An International Journal of Obstetrics and Gynaecology. 107 (3): 375–381. doi:10.1111/j.1471-0528.2000.tb13234.x. ISSN1470-0328.