How Long Should a Menstrual Cycle Be?

Let’s talk about something we all should have been taught properly at school (but weren’t): how long a menstrual cycle should actually be. Because the truth is, many of us are walking around thinking we’re “irregular” or “broken” when our bodies are actually just doing their thing—or calling out for some gentle support.

If you've ever wondered whether your cycle is normal or felt confused by the numbers, this one's for you.

🌸 So… What Is a Menstrual Cycle?

Your menstrual cycle is the time from the first day of one period to the first day of the next. It’s more than just your bleed—it includes everything your body does in the background to prepare for a potential pregnancy, including hormone shifts, ovulation, and more.

📆 What’s Considered a Normal Cycle Length?

The textbook menstrual cycle is 28 days… but the truth? Very few of us are actually exactly 28 days.

A normal cycle can range from 21 to 35 days in adults and 21 to 45 days in teens. What matters most is that your cycle is fairly consistent—give or take a few days each month.

For example:

• If your cycle is always around 30–32 days, that’s normal for you.

• If it’s 28 one month, 40 the next, then 24, that’s something to explore.

🌀 The Four Phases of Your Cycle

To better understand the length of your cycle, it helps to know the four main phases:

1. Menstrual Phase (Days 1–5-ish)
   This is when you bleed and hormone levels are at their lowest.

2. Follicular Phase (Days 1–13)
   Your body prepares to release an egg; estrogen rises.

3. Ovulation (Around Day 14 in a 28-day cycle)
   Your body releases an egg, and you’re at your most fertile.

4. Luteal Phase (Days 15–28)
   Progesterone rises to support a potential pregnancy. If no fertilization happens, hormone levels drop, and your next period begins.

These days will vary depending on your cycle length—but no matter how long your cycle is, ovulation usually happens about 12–14 days before your next period.

🌿 Understanding Your Fertile Window

Your fertile window is the short time in each cycle when pregnancy is possible—and it’s not just the day you ovulate. Sperm can live inside your body for up to 5 days, and your egg only lives for about 12–24 hours after ovulation.

So your fertile window typically includes:

• The 5 days before ovulation

• The day of ovulation

• Possibly the day after ovulation

If you're tracking to avoid or achieve pregnancy, your fertile window is key. You can track it by:

• Monitoring cervical mucus (look for that clear, stretchy “egg white” texture)

• Using ovulation predictor kits

• Tracking basal body temperature

• Tuning into mid-cycle symptoms like ovulation pain or increased libido

🚩 When to Be Concerned About Cycle Length

If your cycle is:

• Shorter than 21 days

• Longer than 35 days

• Changing dramatically month to month

• Missing for months at a time

…it’s worth tuning in. Your body may be trying to tell you something.

Some common causes for irregular or long cycles include:

• Stress

• Undereating or over-exercising

• PCOS

• Endometriosis

• Thyroid imbalances

• Perimenopause

• Coming off hormonal birth control

• Breastfeeding (yep, this can delay your period!)

• Certain medications

🧘🏼‍♀️ What Helped Me Regulate My Own Cycle

After years of irregular, painful periods (thanks, endo 😵‍💫), I started working with my body, not against it. Here’s what genuinely helped me:

• Swapping my morning coffee for dandelion root tea

• Having a daily smoothie with hormone-supportive ingredients (you can find the recipe here)

• Warm lemon water in the morning

• Supporting my gut and liver health naturally

• Tracking my cycle through an app and cervical mucus

• Low-impact workouts and daily walking

• Slowing down during my period, using heat packs, and breathing through the pain (I even started treating it like practice for labour—and it honestly helped in the long run!)

My cycle eventually regulated to around 35 days—and even better, my symptoms improved and I was able to conceive naturally four times.

💕 What’s Normal for You?

We’re all beautifully different. Just because your cycle isn’t 28 days doesn’t mean it’s abnormal. What’s more important is consistency, how you feel, and what your body might be asking for.

So, ask yourself:

• Is your cycle consistent?

• Are your periods painful or heavy?

• Do you feel balanced throughout your cycle—or are you struggling?

If anything feels off, it’s okay to seek support. And that’s exactly what I’m here for.

🛠 Natural Tools for a Balanced Cycle

You don’t have to jump straight into hormonal birth control or pain meds (unless that’s what works for you). There are natural ways to support your body, such as:

• Herbal teas or blends made for your symptoms (see a herbalist or naturopath)

• Cycle-syncing your meals and workouts

• Anti-inflammatory foods like leafy greens, berries, and healthy fats

• Epsom salt baths during your luteal or menstrual phase

• Mindful movement like Pilates, yoga, or walking

💌 Final Thoughts

Your cycle is like a monthly report card from your body. If it’s a little irregular, painful, or long, it doesn’t mean you’re broken—it just means your body is calling out for support.

Listen in, trust your body, and know that you’re not alone in this.

Here at My Inner Seasons, everything we do is about reconnecting you with your body, your rhythm, and your power.

You’re not just learning about your cycle—you’re learning how to live with it.