**Why Did My Cycle Change From 28 To 35 Days?**

Has your regular 28-day menstrual cycle suddenly shifted to 35 days? This change can be concerning, but it's often due to various understandable reasons. WHY.EDU.VN offers expert insights to help…

**Why Is 7 A Lucky Number? Unveiling the Mystery**

Is 7 a lucky number? Absolutely. WHY.EDU.VN explores the cultural, historical, and psychological reasons behind the perceived luckiness of the number seven. Discover the origins of its significance and understand…