pro-oestrus

/ -ˈɛstrəs, prəʊˈiːstrəs /

noun

the period in the oestrous cycle that immediately precedes oestrus

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Example Sentences

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Menstruation, then, must be interpreted as an abortive parturition, both in woman and lower Mammals, though in the latter it is not usually accompanied by hemorrhage, and is called pro-oestrus.