Why do I get different results from 2 different pregnancy test kit brands? One is positive, the other negative

anonymous
This person has chosen to hide his/her identity.

Last menstruation ko was December 31 pa. Nagtry po akong mag PT (pregnancy test) nung February 2, nag positive po pero medyo malabo po ung isa.

And then inulit ko po ng February 3 ng madaling araw, magkaibang PT brand ang gamit ko nag-negative po siya.

At kahapon po ng nag-try ako magpatingin, wala naman po nakita sa ultrasound ko. Ngayun po dinugo ako. Menstrual period ko na po ba to? Buntis ba ako or hindi? Sana po masagot nio po itong tanong ko. Maraming salamat po.


Translation: My last menstruation was last December 31, 2015. I took pregnany test last February 2, and the result was positive. But one of the lines was blurry/blurred.

I took another pregnancy test the following day on February 3, using another brand of pregnanct test kit. The result this time was negative.

Yesterday, I had ultrasound test but they did not see anything. Then today, there is bleeding. Is this already my menstrual period? Or am I pregnant?

 

Reply as anonymous (Your real name and picture will not be seen)
Dr. Gregory Okhifun
is a Medical expert in Netherlands
Thanks for your question.

Although a home test kit rarely reads positive if you're not pregnant, it could be falsely positive if there was blood or protein in the urine or if you were on sleep or anxiety medications at the time of testing.

The negative test you had on the second day might have been caused by a faulty test technique or over dilution of your urine during the test time.

Third, yesterday might have been too early to see any thing on ultrasound. I would, therefore , recommend that you see a GP for evaluation and a blood pregnancy test to confirm pregnancy. A blood pregnancy test is the most accurate test to confirm pregnancy.

I hope I have provided some clarity regarding the problem.

Best wishes.
Critna Joy Lut
is a non-Filipino member from Asia/Pacific Region
Hi doc 1 month and 4 days n po aqng may regla ng PA inject po KC aq dahil 2 months plng po akong nanganak normal po b UN KC mdyo mskit ung puson quh saka ulo..

About the author

Dr. Gregory Okhifun

Excellent doctor, passionate about healthcare and providing quality healthcare solutions to people.
Profession: General Medicine.
All Saints Medical Centre, Nsukka, Nigeria.
Office Address: Nsukka, Nigeria.
Netherlands , Noord-Holland , Amsterdam
The medical information contained in this section is not intended for treatment or prescription. It is used to complement, not replace, the communication between a patient and their physician. Reliance on any information provided by BuhayOFW or any medical experts is solely at your own risk. If you have a medical emergency, call your doctor or go to the hospital immediately. BuhayOFW's Medical Review Board is a team of board-certified doctors who ensure our content is medically accurate and reflects the latest in health information. Our experienced board of medical professionals verify that our content is thorough and all-inclusive, in order that you can trust the information you read here will help you through improvements in your health journey—whether that’s for yourself or for a loved one.