It would be a very large undertaking to describe the changes since hidden breeding cycles are one of the things that separates humans from other apes.
Human women being able to choose when and with whom to mate, secretly, is one of the most significant aspects of what it means to be human.
Humanity is one of the few species whose evolution is primarily driven by sexual selection and not just the “I survived long enough to find a female so I reproduced” strategy we know of as natural selection.