In laboratory experiments,ovariectomized female rats are often rendered receptive by injections of

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Ovariectomized female rats are injected with both estradiol and progesterone in laboratory experiments to render them receptive. Estradiol alone can induce sexual behavior, but progesterone is necessary for full receptivity. Testosterone and androgen are not typically used in these experiments as they are male hormones. Estrogen and estradiol are the same hormone, so the combination of both would not be necessary. Progesterone and testosterone together may have some effect on behavior, but it is not the standard protocol for rendering female rats receptive in laboratory settings.

In Laboratory Experiments,ovariectomized Female Rats Are Often Rendered Receptive by Injections