Health Library
Clinician-reviewed articles on periods, PMS, PCOS, fertility, and hormonal health from Flow & Glow.
Explore
- Track Ovulation Like a Pro: 5 Signs You're Missing
Your body signals ovulation in more ways than one. Learn five often-missed ovulation signs and how to track your fertile window with more confidence.
- Understanding Hormones Throughout Your Cycle
Hormones during menstrual cycle: learn how estrogen, progesterone, FSH, and LH shift throughout your cycle and why those changes affect how you feel every day.
- PCOS Is Now PMOS: What the Name Change Means
PCOS is now PMOS after a May 2026 global consensus rename. Learn what PMOS means, why the name changed, and what it means for symptoms and care.
- Cycle Length and Fertility: Does It Affect Conception?
Cycle length affect fertility: learn how short or long cycles can affect your fertile window and conception chances, and what your cycle length really means for TTC.
- Missed Period Not Pregnant: 8 Reasons Why
Pregnancy test negative but period still missing? Learn 8 common reasons your period may be late, what to track, and when to check in.
- Why You Spot Before Your Period: 7 Common Causes
Spot before your period? Learn common reasons premenstrual spotting happens, what it can mean, what to track, and when to check in with a doctor.
- What Your Period Color Actually Tells You
Period blood color meaning: learn what each period blood color means, from bright red to brown and pink, and when a color change is worth mentioning to your doctor.
- Period Blood Clots: When They're Normal vs. Concerning
Period blood clots normal: not all period blood clots mean something is wrong. Learn when period blood clots are normal and when it's time to check in with your doctor.
- How Long Does a Normal Period Last?
Normal period length days: most periods last 2 to 7 days, with 3 to 5 days being most common. Find out what affects period length and when it might be worth a check-in.
- Why Your Cycle Length Keeps Changing
Discover why irregular cycle length happens. Learn about cycle length variation, period timing changes, irregular cycles causes, and menstrual cycle inconsistent.
- Why Period Pain Gets Worse With Age: Understanding Your Changing Cramps
Learn about cramps getting worse, menstrual pain aging causes, period pain 30s, and dysmenorrhea age solutions.
- First Period After Pregnancy: Your Complete Postpartum Guide
Your complete guide to first period after baby, postpartum period timing, lochia vs period differences, menstruation after childbirth, and breastfeeding effects.
- Cycle Changes in Your 30s: What to Expect as Your Body Ages
Learn about period changes 30s brings, menstrual cycle age 30 patterns, fertility decline 30s, hormonal changes 30s, and perimenopause early signs to watch.
- Why Your Period Changed in Your 20s: What's Normal and What's Not
Period changes in the 20s are normal. Learn about menstrual cycle age 20s patterns, hormonal shifts 20s, and cycle changes young women experience.
- Ovulation Explained: When and How It Happens in Your Cycle
Discover when does ovulation happen, ovulation timing in your cycle, when you ovulate after period, and the egg release process. Complete ovulation guide.
- Luteal Phase: Why This Phase Matters Most for Your Health and Fertility
Discover luteal phase importance: from the implantation window to progesterone phase changes. Learn about luteal phase length, defects, and post-ovulation care.
- Follicular Phase: Everything You Need to Know About Your Cycle First Half
See what happens during the follicular phase: estrogen rising, follicle development, and why this pre-ovulation phase brings energy and focus. Learn more.
- Normal Menstrual Cycle Length: What's Actually Normal for Your Body
Is your cycle normal? Learn the real average cycle length, why the 28 day cycle isn't standard, and when cycle variation normal means seeing a doctor.
- What Happens During Each Phase of Your Cycle: Understanding Your Body's Natural Rhythm
Know what happens during each phase of your cycle. Learn how hormonal changes affect your body, mood, and energy throughout the menstrual cycle phases.