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Indiana University Bloomington
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CTRD Themes

Recent literature and popular news stories reveal strong scientific and popular interest in the reproductive behavior of humans and other animals, including the myriad environmental influences on reproductive development. An overriding objective of this training program is to enhance understanding of the genesis and relevance of sex and gender.

History has shown that important insights into the basic mechanisms of reproduction and development can be gained by study of non-human model systems, as well as evolutionarily diverse non-model systems. The Program’s title, “Common Themes in Reproductive Diversity” is intended to focus attention on the universal challenge all animals must meet, to reproduce and provide for offspring, while also addressing the myriad ways in which animals accomplish these ends. Training focuses on three areas.

Parental Effects on Development

Mothers and fathers affect offspring development in countless ways, many non-genetic. For example, maternal diet during egg production is known to affect offspring sex ratio, body size, and attractiveness to the opposite sex, and maternal exposure to disease allows the transmission of protective antibodies to young.

Several program faculty are devoted to research on parental effects.

Roles of Hormones in the Development and Maintenance of Sex-specific Reproductive Physiology and Behavior

Across species, including humans, many of the behaviors, morphologies, and physiological processes that are essential for reproduction are sexually dimorphic. Studies of model and non-traditional organisms provide important insights into the shared mechanisms by which hormones guide sexual differentiation and/or influence adult reproductive physiology and behavior.

Expertise among program faculty runs from the molecular to the evolutionary.

Collectively, the systems, techniques, and perspectives offered by these diverse scientists provide students a unique opportunity to explore common themes in the role of hormones in accounting for reproductive diversity.

Disease, Immunity, and Reproductive Function

Sexual physiology and behavior are linked in a wide variety of intriguing ways with the transmission of diseases and parasites and an organism's ability to cope with disease and illness. Sexual behavior is a major mode of disease transmission in humans as well as other animals, and sexually and non-sexually transmitted diseases and parasites play a critical role in the evolution and maintenance of sexual reproduction in natural populations.

The program’s faculty includes leading experts in the relationships among disease, parasitism, immunity, and sexual reproduction.