How much does it cost to have the lab test it?

To have a lab test for your blood type, it is usually around $100. I myself have had no luck asking doctors to test for my blood type. They usually only test if it’s necessary.

I did 2 just to be sure. The first one showed A negative. The second A positive. Is one more sure than the other?

I think for the rhd it has a window, between 30 seconds and 2 minutes, anything after that is positive, so it might be that you're A-

Has anyone used this test knowing their blood type prior to taking the test to confirm its accuracy?

Yes I knew 3 of my family’s blood type but bought 5 to find out my other 2 kids and it was 100% accurate. The 3 I knew and that came up correct was A+, O+ and A-. So spot on.

Blood Type Test 1 Pack | Desertcart Hong Kong

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HK$130

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Description

🩸 Know Your Type, Own Your Health—Fast, Safe, and Simple!

KEEP IT FOREVER - Durable card stores your blood type info permanently—perfect for emergencies or peace of mind.
TRUSTED ACCURACY - Clinically proven technology ensures reliable results you can count on.
ALL IN ONE SAFETY KIT - Includes lancet, micropipette, cleansing swab & sealed envelope for hygienic home testing.
DUAL FACTOR DETECTION - Know both your ABO group and Rh factor for comprehensive blood typing.
INSTANT CLARITY ZERO GUESSWORK - Get your precise blood type in just minutes—no lab visit needed.

The Eldoncard INC Blood Type Test is a clinically reliable, easy-to-use home kit that delivers accurate ABO and Rh blood type results within minutes. Featuring a complete testing set with safety lancet, micropipette, cleansing swab, and a durable card for permanent record-keeping, it empowers professionals to take control of their health conveniently and confidently without lab visits.

Specifications

ASIN	B00JFTSPMW
Best Sellers Rank	#3,698 in Health & Household ( See Top 100 in Health & Household ) #17 in Home Medical Tests
Customer Reviews	4.3 4.3 out of 5 stars (29,304)
Date First Available	June 24, 2009
Department	Unisex-Adult
Is Discontinued By Manufacturer	No
Item model number	504-18
Manufacturer	EldonCard
Product Dimensions	6 x 5 x 0.5 inches; 0.63 ounces

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HK$130

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In stock

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

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Blood Type Test, 1 Pack

Description

Specifications

Common Questions