Week 1

First day of period to Day 7
Today's hormone-cast: It's easier than it's been in the past week to overlook someone else's faults. Your renewed patience comes courtesy of estrogen. As this hormone rises, which it does today, it boosts the feel-good brain chemical serotonin—and that makes you feel more optimistic, upbeat and forgiving.

Week 2

Day 8 to Day 13
Today's hormone-cast: Your tastebuds are more sensitive to flavor today thanks to high estrogen. Want to enjoy the taste of your food even more? Put off drinking your beverage till the end of your meal. Researchers recently discovered that chewing and swallowing food triggers the growth of odor-releasing microbes that are key to unlocking the flavor in food. When you drink, it flushes away those microbes and the delicious flavors they provide!

Week 3
Day 14 (or ovulation) to Day 22
Today's hormone-cast: Rising progesterone is making you feel hungrier today. But don't ignore your grumbling tummy! A new University of Cambridge study shows that an empty stomach can cost you money! How so? Being hungry depletes your brain of serotonin, a chemical known for regulating mood and, as the researchers just discovered, also for making sound financial decisions! Luckily, a quick snack is all you need to boost your serotonin—and money handling skills—right back up!

Week 4

Day 23 to the end of cycle
Today's hormone-cast: You'll probably find it harder to recall details today. That's plunging estrogen's fault. As it descends, it makes it harder to remember facts you knew so well during the first two weeks of your cycle when this hormone was rising. Luckily, no matter where you are in your cycle, you can improve your memory by drinking tea or cocoa or eating blueberries or grapes. A new study shows that these foods all contain a certain compound that improves the function of the "dentate gyrus", the part of your brain responsible for memory and learning.

Gabrielle Lichterman is the founder of Hormonology, the hormone horoscope. Based on real scientific hormone research, Hormonology shows you how to use your hormone cycle to accurately predict your day and plan your life. Learn more: myhormonology.com