Why is Nat using Natural Cycles? It’s all part of a grand experiment. In this episode, Nat compares her symptothermal and Billings chart to the Natural Cycles algorithm. How effective is Natural Cycles, and how does it compare to a FABM? We also talk about:

• The fallacy that tech is smarter than us
• Long cycles and predicted ovulation in period tracking apps
• The psychology behind the seamless “FDA approved” design
• Red days and calculation rules in long cycles
• Outsourcing our sense of security to tech
• And replacing the feeling of safety on the pill with an app

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