This is a book with extensive information on the female reproductive system. There is also a website and app that will provide you with the powerful knowledge about the changes your body goes through each month and how these signal your signs of fertility, which can be helpful for pregnancy achievement or avoidance.
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Most importantly, this is information about the female reproductive system that everyone, male and female should know! For example, the female body has multiple signals of fertility, including waking body temperature, cervical fluid and cervical position and softness.