Natural Cycles is a birth control app 👏 not a period tracking app 👏 Now, don’t get us wrong, understanding when ovulation takes place in the cycle is a key part of identifying the fertile window. It’s possible to find ovulation by taking LH tests which measure a surge of hormones in urine, or by charting basal body temperature to find the spike in temperature which is also triggered by hormones and signifies ovulation has taken place. However ☝️ finding ovulation alone is not enough to prevent pregnancy. This is because of sperm survival – sperm can live for up to five days inside the female reproductive system, so having sex five days before ovulation puts you at risk of getting pregnant 👀 This is where Natural Cycles comes in 👋 Our birth control app uses basal body temperature data, paired with an algorithm which learns the pattern in your cycle, so it can predict and find ovulation from cycle to cycle 📲 The app gives green days for days when you’re not fertile and red days when there is a risk of becoming pregnant 💜 If the algorithm is ever in doubt, it errs on the side of caution and gives a red day 🙅 With a daily fertility status, you’re in no doubt where you are in your cycle and if there is a risk of becoming pregnant on that day ❤️💚