Research on sex hormones and human sexual behavior indicates that

A) sexual desire rises slightly at ovulation among women with mates.
B) adult men who have been castrated show virtually no reduction in sex drive.
C) sexual interests are aroused by decreased testosterone levels in women and increased testosterone levels in men.
D) imprisoned male sex offenders typically experience lower-than-normal testosterone levels.

Research has shown that sexual desire tends to increase slightly in women at ovulation, which is when the egg is released from the ovary and is available for fertilization. This increase in sexual desire is thought to be related to changes in hormone levels, specifically increases in estrogen and progesterone. However, this increase is only observed in women who have a mate, as opposed to single women.

Answer: D
Research has shown that incarcerated male sex offenders tend to have lower-than-normal levels of testosterone. This is thought to be due to the stress and anxiety associated with being imprisoned, as well as the societal stigma surrounding their offenses. However, it is important to note that low testosterone levels do not necessarily cause sexual offending behavior, and not all male sex offenders have low testosterone levels.