Are all pregnancy tests created equal?

posted 2 years ago in TTC
Post # 2
4483 posts
Honey bee
  • Wedding: April 2015

Never been pregnant but I’ve heard blue dye sucks. Stick to pink! 

Post # 4
3756 posts
Honey bee
  • Wedding: April 2014

Blue dye tests are notorious for false positives. Pink dye tests are the best bet for early detection, specifically First Response Early Result. Digitals are less sensitive than early result line tests so you are more likely to get a negative if used to early. Most people use them to confirm a pregnancy after already seeing positives on pink dye tests.

This old thread used to be a sticky on the TTC boards before the re-design, it’s very helpful for sensitivity levels but doesn’t specify if it’s a pink or blue dye test. I think ClearBlue, EPT and Walmart Equate brand are some of the blue dye tests. Most of the others are pink. I swear by First Response Early Result, but they are pricey. Dollar store or Wondfo’s are good to stock up on if you want to test frequently and save the FRERs to confirm after getting two lines on a cheapo.

Post # 5
2820 posts
Sugar bee
  • Wedding: June 2013

Pink dye tests are less likely to show an evaporation line (aka a “false positive.”)

Digital tests are less sensitive, and usually give the most accurate reading after you’ve missed your period. You could test positive on an FRER and still be getting negative digitals for another day or two. 

First Response Early Results are the gold standard. They’re also expensive as hell. You can get them cheaper on Amazon. They’ll give you a positive result a few days sooner than other tests. 

If you are addicted to taking pregnancy tests, Wonfo dip strips are super duper cheap and you can get them on Amazon in bulk. 

Post # 6
2593 posts
Sugar bee
  • Wedding: May 2009

Pink dye or black dye, (OSOMs, a black dye test, are the most sensitive I’ve heard of), never blue dye.  Digitals are nice if you want to get that “Pregnant” on a test for a picture, but tend not to be as sensitive.

Also, there is a lot of variation between brands as far as sensitivity.  As mentioned above, OSOMs are probably the most sensitive, so if you plan on testing very early, they should be your go-to, (keep in mind they will test positive at very low amounts, so you could potentially find out about a chemical/early miscarriage you would not have normally known about; it’s up to you if that’s a good thing or a bad thing).  Dollar store tests are cheap, and fairly sensitive, so if you plan on testing a lot, they might be a good choice for you, (Wondfos are even cheaper at about $20 for 50 tests, but not quite as sensitive).  FRERs are one of the most sensitive pink dye tests, but they are a bit more expensive, so if it takes you a while to get pregnant, you could end up spending a lot of money on them over the months.

Post # 8
2251 posts
Buzzing bee
  • Wedding: May 2013

I’ve heard/read the same about blue dye giving false positives. 

FRER’s are the gold standard, but here’s something interesting. This is from the FRER website/box. I was shocked when I first read the box and realized the 6 days sooner is BS! Try 3, if you’re lucky!

# of Days before expected period/% of pregnant women with + results






  • This reply was modified 1 year, 12 months ago by  HeyJude72.
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