29/01/2026
Here are 5 important (and kinda surprising) facts about menstruation:
By Dr. Tanvi Dua
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1️⃣ The “total lifetime blood” amount is way smaller than people think
The average person who menstruates loses only about 30–80 mL (2–6 tablespoons) of blood per cycle. Over a lifetime (≈ 400–450 periods), that’s roughly 10–15 liters total — about the same as a couple of big soda bottles, not buckets like people imagine.
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2️⃣ Period blood is NOT “dirty” blood
It’s a mix of:
• Blood
• Uterine lining tissue
• Cervical mucus
• Vaginal secretions
It’s clean, natural body tissue, not waste or toxins. The body isn’t “detoxing” — it’s simply shedding a lining it built in case of pregnancy.
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3️⃣ Your brain runs your period, not just your uterus
The menstrual cycle is controlled by a hormone conversation between the brain and ovaries:
• Hypothalamus
• Pituitary gland
• Ovaries
Stress, sleep changes, illness, travel, or weight shifts can disrupt this brain–ovary signaling — which is why periods can suddenly change.
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4️⃣ You can ovulate without having a period (and vice versa)
• Ovulation can happen even if periods are irregular or absent (like after stopping birth control).
• Some bleeding that looks like a period isn’t a true menstrual bleed (it can be hormone-related breakthrough bleeding).
This is why pregnancy can happen even when someone thinks their cycle is “off.”
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5️⃣ Period pain isn’t “just in your head” — it’s caused by chemicals
Cramps are due to prostaglandins, hormone-like chemicals that make the uterus contract to shed its lining.
Higher levels = stronger contractions = more pain, nausea, diarrhea, headaches.
Severe pain isn’t normal and can signal conditions like endometriosis or fibroids.
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