Anogenital distance measured at weaning is correlated with measures of blood chemistry and behaviors in 450-day-old female mice

• Published in: Physiology & behavior 2003-04, Vol.78 (4), p.697-702
• Main Authors: Kerin, Tara K., Vogler, George P., Blizard, David A., Stout, Joseph T., McClearn, Gerald E., Vandenbergh, David J.
• Format: Article
• Language: English
• Subjects: AGDI; Aging - physiology; Anal Canal - anatomy & histology; Anal Canal - physiology; Animals; Behavior, Animal - physiology; Biological and medical sciences; Blood Chemical Analysis; Body Weight - physiology; Development. Metamorphosis. Moult. Ageing; Female; Fundamental and applied biological sciences. Psychology; Genitalia, Female - anatomy & histology; Genitalia, Female - physiology; Intrauterine position; IUP; Male; Mice; Mice, Inbred C57BL; Mice, Inbred DBA; Sex Characteristics; Sex differences; Sex of adjacent fetus; Testosterone - blood; Uterus - anatomy & histology; Uterus - physiology; Vertebrates: anatomy and physiology, studies on body, several organs or systems; Weaning
• ISSN: 0031-9384; 1873-507X
• DOI: 10.1016/S0031-9384(03)00054-4

In female mice, anogenital distance (AGD), measured at weaning, provides an estimate of uterine exposure to testosterone from flanking male mouse littermates. A variant of the anogenital distance index (AGDI) that uses the residual value of AGD after accounting for the effect of weight by regression (AGDWTRES) was measured at weaning in F 2 female mice from a C57BL/6J×DBA2/J cross. AGDWTRES was used to examine the relationship between intrauterine environment and blood chemistry variables and activity-related behaviors when the females were 450 days old. Longer AGDWTRES values correlated with lower levels of calcium, cholesterol, phosphorus, iron, and protein, which is opposite to the expected direction, based on underlying sex differences for blood chemistry. A positive correlation was found between AGDWTRES and two activity-related measures (the number of rears in a test of exploration, and the number of sectors of a rod that are entered by the mouse). These findings suggest that in utero proximity to males, as indexed by AGDWTRES, may have effects on fundamental aspects of blood chemistry and behavior that extend well into mouse middle age, and could play an important role in health.