Period blood is more than just blood—it’s a mixture of uterine lining, blood, and other fluids that your body sheds each month. Here’s a detailed breakdown:

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What Period Blood Is Made Of

1. Blood

• The obvious component is blood from small blood vessels in the uterus.

• Menstrual blood is usually bright red at the start and may darken as it exits the body.

• It contains red blood cells, white blood cells, and plasma.

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2. Endometrial Tissue

• The endometrium is the lining of the uterus.

• Each month, the body thickens this lining to prepare for a possible pregnancy.

• If no fertilized egg implants, the lining breaks down and is shed during menstruation.

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3. Cervical and Vaginal Fluids

• Menstrual blood mixes with cervical mucus, which helps protect the uterus and vagina.

• Vaginal secretions also help expel tissue and blood efficiently.

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4. Other Components

• Small clots: Formed when blood partially coagulates; usually harmless

• Cells and proteins: From uterine lining and immune cells

• Hormones: Traces of estrogen and progesterone are present

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5. Characteristics of Period Blood

• Color: Bright red, dark red, or brown, depending on age of the blood and flow

• Texture: Can be liquid or contain small clots

• Smell: Slight metallic or iron scent is normal; strong or foul odor may indicate infection

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Summary

Period blood is a combination of:

1. Blood from uterine vessels

2. Endometrial tissue (uterine lining)

3. Cervical and vaginal fluids

4. Small clots, cells, and hormones

It’s the body’s way of resetting the uterus each cycle in preparation for a potential pregnancy.