Clark M M, Ham M, Galef B G
Department of Psychology, McMaster University, Hamilton, Ontario, Canada.
J Reprod Fertil. 1994 Jul;101(2):393-6. doi: 10.1530/jrf.0.1010393.
Two experiments were undertaken to investigate the cause of the observed tendency of Mongolian gerbil dams to gestate more male than female fetuses in their right uterine horns and more female than male fetuses in their left uterine horns. It was found in Expt 1 that female gerbils that had both ovaries removed and portions of their right ovary placed in both ovarian capsules gestated significantly more male fetuses than did females that had both ovaries removed and portions of their left ovaries placed in both ovarian capsules. Expt 2 showed that female gerbils that had both their ovaries removed and then returned to their original locations gestated more males in their right uterine horns than in their left, while females that had the positions of their ovaries exchanged gestated more male fetuses in their left uterine horns than in their right. The data were consistent with the hypothesis that lateral asymmetries in gerbil ovaries rather than in gerbil uterine horns cause partial uterine segregation of gerbil fetuses by sex.
进行了两项实验，以探究观察到的蒙古沙鼠母鼠子宫角中雄性胎儿多于雌性胎儿，以及左子宫角中雌性胎儿多于雄性胎儿这一倾向的原因。在实验1中发现，切除双侧卵巢并将右侧卵巢部分组织植入双侧卵巢囊的雌性沙鼠，其孕育的雄性胎儿显著多于切除双侧卵巢并将左侧卵巢部分组织植入双侧卵巢囊的雌性沙鼠。实验2表明，切除双侧卵巢后放回原位的雌性沙鼠，其右子宫角孕育的雄性胎儿多于左子宫角，而卵巢位置互换的雌性沙鼠，其左子宫角孕育的雄性胎儿多于右子宫角。这些数据与以下假设一致：沙鼠卵巢的侧不对称而非子宫角的侧不对称导致沙鼠胎儿按性别在子宫内部分分离。
