You can figure out which menstrual phase you’re in by counting the days since your last period started, paying attention to a few body signals, and knowing what each phase looks and feels like. A normal cycle runs between 24 and 38 days, and it breaks into four distinct phases, each driven by different hormones that produce noticeable physical changes.
The Four Phases of Your Cycle
Day 1 of your cycle is always the first day of your period, not the last. Everything counts forward from there.
- Menstrual phase (roughly days 1 to 5): Your uterine lining sheds. Most people bleed for three to five days, though anywhere from three to seven days is typical. Total blood loss for a normal period is under 60 mL, or about four tablespoons.
- Follicular phase (days 1 through ovulation): This overlaps with your period and continues after bleeding stops. Estrogen climbs steadily, stimulating your ovaries to prepare an egg. In a 28-day cycle, this phase lasts about 14 days, but it’s the phase most likely to vary in length from person to person.
- Ovulation (around day 14): A surge of luteinizing hormone triggers your ovary to release an egg. Once that surge is detected in urine (what ovulation test strips measure), the egg typically releases within 12 to 24 hours.
- Luteal phase (roughly days 15 to 28): Progesterone rises sharply and stays elevated, preparing your uterine lining for a possible pregnancy. This phase is more consistent in length than the follicular phase, usually lasting about 14 days regardless of your total cycle length.
If your cycle is 32 days instead of 28, the extra days almost always come from a longer follicular phase. Your luteal phase stays close to 14 days. This matters because it means ovulation happens later than day 14 in longer cycles.
How to Tell by Cervical Mucus
Cervical mucus is one of the most reliable day-to-day indicators of where you are in your cycle, because it changes dramatically in response to hormones.
Right after your period ends, you’ll notice very little discharge. What’s there tends to be dry or tacky, white or slightly yellow. As you move through the follicular phase (roughly days 4 to 9), it becomes sticky, then creamy and yogurt-like, wet and cloudy.
The clearest signal comes around ovulation. Between days 10 and 14, mucus becomes stretchy, slippery, and resembles raw egg whites. If you can stretch it between your fingers without it breaking, you’re likely in or very near your fertile window. This consistency exists for a functional reason: it helps sperm travel more easily.
After ovulation, discharge dries up noticeably. Through the entire luteal phase, mucus is thick and minimal, or nearly absent, until your period arrives.
How to Tell by Temperature
Basal body temperature, your temperature first thing in the morning before getting out of bed, drops slightly before ovulation and then rises afterward. The increase is small: less than half a degree Fahrenheit for most people, though it can range from 0.4°F to 1°F. That shift confirms you’ve entered the luteal phase.
The catch is that temperature tracking only tells you ovulation happened after the fact. It won’t predict it in advance the way mucus changes or LH test strips can. But if you’ve been tracking for a few cycles, you’ll start to see a consistent pattern that helps you place yourself on any given day.
What Each Phase Feels Like
Beyond the obvious (bleeding during your period), each phase has a recognizable emotional and physical signature.
During the follicular phase, rising estrogen tends to boost energy and mood. Many people feel their sharpest, most motivated, and most social during this stretch. Workouts often feel easier. Skin may look clearer as estrogen supports collagen and oil regulation.
Around ovulation, some people feel a one-sided twinge or mild cramping in their lower abdomen, sometimes called mittelschmerz. Libido often peaks. You may also notice mild breast tenderness beginning around this time. In cycles with normal ovulation, breast tenderness is more pronounced and lasts longer, typically around four to five days.
The luteal phase is where things shift. Progesterone is a sedating hormone, and its rapid rise after ovulation commonly causes fatigue, lower energy, and a desire for more sleep. The most frequently reported luteal symptoms are irritability, mood swings, food cravings (especially for carbohydrates and sweets), bloating, weight gain from water retention, and breast tenderness. These symptoms tend to intensify in the final week before your period and disappear once bleeding starts. Not everyone experiences them with the same intensity. The severity appears to depend partly on the specific pattern of progesterone rise rather than just the total amount.
Putting It Together
To figure out where you are right now, start with the simplest question: when did your last period start? Count forward from that day. If you’re on day 3, you’re in the menstrual phase. Day 10 with creamy or egg-white mucus? Late follicular, approaching ovulation. Day 20 with dry mucus, sore breasts, and lower energy? Solidly in the luteal phase.
If you don’t remember exactly when your period started, your body still gives you clues. Egg-white mucus means you’re near ovulation. Dry mucus plus breast tenderness and fatigue points to the luteal phase. Bleeding is, of course, the menstrual phase. The follicular phase after bleeding stops is the quietest stretch, marked mainly by gradually increasing energy and slowly changing mucus.
Keep in mind that a “28-day cycle” is just an average. Cycles between 24 and 38 days are medically normal. If yours runs 35 days, ovulation probably happens around day 21 rather than day 14, and all the phase landmarks shift accordingly. Tracking your cycle for two or three months, even with just a notes app, gives you a much more accurate personal map than any generic chart.
When Your Cycle Length Varies
If your cycles swing between, say, 26 and 34 days, the variation is almost always in the follicular phase. Your body may take longer to select and mature an egg some months than others, due to stress, illness, travel, or weight changes. The luteal phase stays relatively fixed. This means you can’t just count backward from your expected period and assume ovulation was on a specific day, because if this cycle’s follicular phase ran long, everything shifted.
Cycles shorter than 24 days or longer than 38 days fall outside the normal range. If you haven’t had a period for 90 days and aren’t pregnant or breastfeeding, that’s worth a medical conversation. Otherwise, some cycle-to-cycle variation is completely typical and doesn’t indicate a problem.