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Hysteroscopy: MedlinePlus Medical Encyclopedia
In certain dolphin species, namely Bottlenose, female vaginal tracts secrete an organic chemical while mating that allow a male to orgasm for as long as the penis remains within the vaginal tract, resulting in multiple continuous ejaculations. This is speculated to increase chances of fertilization for each act of reproduction.
Hysteroscopy is a procedure to look at the inside of the womb uterus.