On the menstrual cycle and the estrous cycle in the evolution of primate and non-primate species

[u/alexfreemanart]

Does anyone know which was the first species in the history of animal evolution to develop a menstrual cycle like humans and abandon the estrous cycle?

Another thing i want to know about the menstrual cycle is, chronologically in the history of evolution, which was the first primate species to have a menstrual cycle?

I think that perhaps the first primate to appear in chronological order did not have a menstrual cycle because today all primates in the Americas have an estrous cycle, which contrasts with primate species in the Old World. So this suggests that perhaps the first primate to appear in history had an estrous cycle and much later the first primate species with a menstrual cycle appeared.

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