与低水平的唾液睾酮相关的是较高水平的爱情满意度和忠诚度，男性对婚外性的兴趣较低，离婚的几率也较低。
Lower levels of salivary testosterone have also been tied to higher self-reported levels of relationship satisfaction and commitment, a lower interest in sex outside of marriage and a lower chance of divorce.
因此，似乎在向人父转变的过程中，父亲的睾丸素水平下降，会使其停止寻求新的交配机会，投身于目前的关系及照顾后代。
So it would seem that a father’s decrease in testosterone levels during the transition to parenthood leads him from exploring new mating opportunities towards investment into the current relationship and caring for offspring.
这项研究由南加州大学的Darby Saxbe带领，他们追踪了27对夫妻怀第一胎以及孩子出生后几个月里的情况。他们测量了在怀孕期间家长们的睾丸素水平。
Led by Darby Saxbe of the University of Southern California, the study followed 27 couples expecting their first child during pregnancy and first few months after birth.
孩子出生后的几个月中，参与调查的夫妻还要对自身的投入度，忠诚度和对伴侣的满意度进行打分。
The parents’ testosterone levels were measured during this pregnancy, and participants rated their investment, commitment, and satisfaction with their partner a few months after their child’s birth.
该研究小组发现，在伴侣怀孕期间，父亲的睾丸素水平出现明显的下降，并且与母亲的睾丸素水平呈显著的正相关。
The team found that fathers showed significant declines in testosterone while the pregnancy progressed, and a significant positive correlation with the mother’s testosterone levels.
在怀孕期间母亲和父亲的睾丸素水平之间的相关性越好，孩子出生后父亲的参与程度越高——父母之间的同步程度预示着父亲的投入度、忠诚度和对夫妻关系的满意度。
A better correlation between the mother’s and father’s testosterone levels during pregnancy was associated with higher levels of father involvement after the child’s birth — the degree of synchrony between the parents predicted the fathers’ investment, commitment, and satisfaction in the couple relationship.