Effects of testosterone on the behaviour of the domestic chick. I. Effects present in males but not females. Anim. Behav. 23, 139-155.Andrew, R.J., 1975. Effects of testosterone on the behaviour of the domestic chick: II. Effects present in both sexes. Anim. Behav. 23 (Part 1), ...
It is larger in males than females and males use the dewlap more frequently and in more contexts than do females. In the present study we investigated whether plasma testosterone (T) levels and season affect the frequency of dewlap use in male–male interactions in the brown anole, Anolis ...
The problems associated with high testosterone levels are infrequent and rare in middle-aged and elderly men who are not receiving testosterone or other steroid treatments. When the testosterone level becomes out of balance, it usually becomes too low rather than too elevated. What are the signs a...
The leopard gecko, Eublepharis macularius, is a species in which testosterone (T) is the primary circulating sex hormone in adults of both sexes. There are, however, sex differences in T physiology. Whereas males have prolonged periods with high T levels, T levels cycle in accord with folli...
Testosterone, hormone produced by the male testis that is responsible for development of the male sex organs and masculine characteristics, including facial hair and deepening of the voice. Testosterone was isolated from testicular extracts in 1935. Lear
Uncommon(0.1% to 1%): Increased blood testosterone Frequency not reported: Signs of virilization in women (e.g., hoarseness, acne, hirsutism, menstrual irregularity, clitoral enlargement, and alopecia), precocious puberty (in prepubertal males) ...
and testosterone (0.001–0.01 mg/kg, i.m.) on the discriminative stimulus effects of cocaine (0.18 mg/kg, i.m.) were examined. Progesterone and testosterone did not alter cocaine discrimination, and did not substitute for cocaine. In contrast, progesterone and testosterone each significantly ...
Because there are at least 200,000 anterior cruciate ligament (ACL) reconstructions performed each year in the United States [1], it will be beneficial to improve the recovery process. One possible method may be the use of intramuscular testosterone, which has been shown to increase muscle mass...
Supernumerary sex chromosome aneuploidies (sSCA) are characterized by the presence of one or more additional sex chromosomes in an individual’s karyotype; they affect around 1 in 400 individuals. Although there is high variability, each sSCA subtype has a characteristic set of cognitive and physical...
4. Hydrogenated fat decreased the level of serum testosterone in males, but the differences observed in levels of serum progesterone in females were not apparently related to the dietarytrans-fatty acids. 展开 关键词: fatty acids, isomerization, diet, rats, reproduction ...