Home Pregnancy Tests and hCG

Brand
Detects
AimStick Dipstick 20 mIU
AimStep Cassette 20 mIU
Early-Pregnancy-Tests 20 mIU
AimStick Midstream (AccuHome) 25 mIU
Clearblue Easy (UK) 25 mIU
Day Seven (CDN) 25 mIU
Health Check 25 mIU
One Step Be Sure 25 mIU
Rapid Self-Test 25 mIU
E.P.T 40 mIU
Clearblue Easy (US) 50 mIU
Boots 50 mIU
Early Bird One Step 50 mIU
Early Pregnancy test 50 mIU
Hannaford 50 mIU
Rite-Aid 50 mIU
Selfcare 50 mIU
CVS 60 mIU
First Response 100 mIU
Answer 100 mIU
Conceive 100 mIU
Precise 100 mIU
Fact Plus 150-250mIU

Q: How soon after ovulation can I test?

A: The earliest you can get a positive result on the most sensitive pregnancy tests is seven days after ovulation. Implantation needs to occur before hCG is produced, and that generally happens between 6-12 days post ovulation, usually by 10 days after. For this reason, it makes economical sense to wait until 10-12 days after ovulation, but even then a significant percentage of women who are pregnant will still show a negative result. Many people won't have a positive HPT until the first day of a missed period or even a few days later.

Q: How accurate are home pregnancy tests on the first day of a missed period?

A: The highest possible screening sensitivity for an hCG-based pregnancy test (20-25 mIU/ml) conducted on the first day of a missed period is 90 percent, as 10 percent of women may not have implanted yet. With the same test, one week after the first day of the missed period the accuracy increases to 97 percent.

Q: What time of the day can I use the test?

Because home pregnancy tests detect hCG, diluted urine samples (from drinking large quantities of water) aren't recommended. It is best to collect urine samples containing the highest presence of the hCG hormone. First morning urine is the ideal sample as it contains the most concentrated presence of hCG. Otherwise, waiting several hours (4-5 minimum) is considered sufficient duration for an HPT.

Q: How do I use the test?

test stripA: There are two types of HPT's -- test strips and midstream tests. For test strips, immerse the strip into the urine sample with the arrow end pointing towards the urine. Do not immerse past the MAX (Marker Line). Take the strip out after 3 seconds and lay the strip flat on a clean, dry, non-absorbent surface. Wait for colored bands to appear. Depending on the concentration of hCG in the test specimen, positive results may be observed in as little as 40 seconds. However, to confirm negative results, the complete reaction time of 5 minutes is required. Do not read results after the 5 minute reaction time.