Neurons are the basic building blocks of the nervous system. These specialized cells are the information-processing units of the brain responsible for receiving and transmitting information. Each part of the neuron plays a role in the communication of information throughout the body.
There is 850,00 rubber bands in the current world's largest rubber band ball. That certainly is a lot!!
So now we would have to find out how many women are in that age group. According to [3], there are about 2 billion women world-wide in that age group. That would give you the answer of about 334 million. Note that this is only a very rough ballpark number, as we do not have exact information about the global average menstrual cycle length, the exact population numbers etc.