My HormonologyWhen you need to come up with a perfect solution to fix a sticky issue, set aside time during your Week 2 (which starts 8 days after the first day of your period) to work on it. According to a study in the journal Psychoneuroendocrinology, your ability to churn out lots of ideas peaks in this week of your cycle thanks to high estrogen. As the researchers explain it, as the level of this hormone gets higher and higher, it amps up how quickly you think on your feet while also making you less judgmental about what you dream up, which helps you produce more ingenious solutions!