Jacklin C N, Maccoby E E, Doering C H, King D R
Dev Psychobiol. 1984 May;17(3):301-10. doi: 10.1002/dev.420170309.
Five sex-steroid hormones were assayed in umbilical cord blood. Strength was assessed in children in three samples at several ages from birth to 33 months. At different ages, different strength measures were taken, viz., at birth, prone head responses; at 3 months, leg strength; from 6 to 33 months, grip strength. Boys had higher average strength scores than girls but the sex differences were small and did not increase or decrease over the age period studied. Across-age strength scores showed a significant relation to androstenedione and a significant interaction of sex and progesterone. Both boys and girls with higher strength scores had lower androstenedione. Girls with high cord blood progesterone showed low strength while boys with high progesterone showed high strength. There were no sex differences in androstenedione or progesterone level. The androstenedione finding did not replicate across samples but the Progesterone X Sex interaction was replicated in all three samples. No relationship was found between strength and other hormones assayed: testosterone, estradiol, and estrone.
对脐带血中的五种性类固醇激素进行了测定。在出生至33个月的几个年龄段，对三个样本中的儿童进行了力量评估。在不同年龄，采用了不同的力量测量方法，即出生时为俯卧抬头反应；3个月时为腿部力量；6至33个月时为握力。男孩的平均力量得分高于女孩，但性别差异较小，且在研究的年龄阶段没有增加或减少。跨年龄的力量得分与雄烯二酮有显著关系，且性别与孕酮存在显著交互作用。力量得分较高的男孩和女孩的雄烯二酮水平较低。脐带血孕酮水平高的女孩力量较低，而孕酮水平高的男孩力量较高。雄烯二酮或孕酮水平不存在性别差异。雄烯二酮的研究结果在不同样本中未得到重复，但孕酮与性别的交互作用在所有三个样本中均得到了重复。未发现力量与其他检测激素（睾酮、雌二醇和雌酮）之间存在关系。
