How much blood is lost during periods in 7 days?

Menstrual bleeding varies among women, but most experience a moderate amount of blood loss over their period. Knowing what’s typical can help you recognize when your flow may be too light, too heavy, or unusual, which could indicate a health issue.

1. Average Blood Loss

  • Most women lose about 30–40 milliliters (ml) of blood per cycle.

  • In more familiar terms, that’s roughly 2–3 tablespoons over the entire period.

  • Blood loss up to 80 ml per cycle is still considered within the normal range.

2. Duration of a Typical Period

  • Periods usually last 3–7 days.

  • Blood flow is typically heavier in the first 2–3 days and lighter toward the end.

3. Signs of Abnormal Blood Loss

  • Heavy bleeding (menorrhagia): Soaking through more than one pad or tampon per hour, passing large clots, or periods lasting longer than 7 days

  • Very light bleeding (hypomenorrhea): Periods with only spotting or extremely light flow for several cycles

4. Factors That Affect Blood Loss

  • Hormonal changes or imbalances

  • Uterine conditions like fibroids or polyps

  • Medications such as anticoagulants or hormonal therapy

  • Stress, diet, or excessive exercise

5. Tracking Your Flow

  • Keep a menstrual diary or app to record flow intensity, duration, and clotting.

  • Helps you detect abnormal patterns early and discuss them with your healthcare provider.

Final Thoughts

Most women lose 30–40 ml of blood over a 7-day period, though this can vary. Understanding normal menstrual flow and tracking your cycle is key to recognizing changes that could indicate health issues, ensuring proper care and peace of mind.

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