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| A duct system in the embryo that will develop into female reproductive structures (fallopian tubes, uterus, and upper vagina) if testes are not present. |
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| The second stage of mating behavior; helps establish or maintain sexual interaction. |
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| Insertion of the erect penis into the vagina during copulation. |
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| A gene on the Y chromosome that directs the developing gonads to become testes. The name SRY stands for sex-determining region on the Y chromosome. |
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| The final stage in mating behavior. Species-specific postcopulatory behaviors include rolling (in the cat) and grooming (in the rat). |
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| The process by which the decision is made for a fetus to develop as a male or a female. |
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| A duct system in the embryo that will develop into male structures (the epididymis, vas deferens, and seminal vesicles) if testes are present in the embryo. |
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| Also called müllerian regression hormone. A protein hormone secreted by the fetal testis that inhibits müllerian duct development. |
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| Referring to the state in which an individual (in mammals, typically the female) is willing to copulate. |
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| A region of the anterior hypothalamus implicated in the control of many behaviors, including thermoregulation, sexual behavior, and gonadotropin secretion. |
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| The period during which female animals are sexually receptive. |
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| A chemical signal that is released outside the body of an animal and affects other members of the same species. |
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| Referring to an individual with atypical genital development and sexual differentiation that generally resembles a form intermediate between typical male and typical female genitals. |
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| The chemical reaction that converts testosterone to estradiol, and other androgens to other estrogens. |
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| Referring to a state in which an animal advertises its readiness to mate through species-typical behaviors, such as ear wiggling in the female rat. |
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Definition
| A female receptive posture in quadrupeds in which the hindquarter is raised and the tail is turned to one side, facilitating intromission by the male. |
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| The process by which individuals develop either malelike or female like bodies and behavior. |
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| A permanent alteration of the nervous system, and thus permanent change in behavior, resulting from the action of a steroid hormone on an animal early in its development. |
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| The condition in which males and females show pronounced sex differences in appearance. |
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