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Yes — Wondfo has a sensitivity of 25 mIU/ml and can detect pregnancy at 17 if HCG is above this threshold. Typical HCG at 17 is 400–1200 mIU/ml. A faint line at 17 on Wondfo is a meaningful result.
A faint line on a Wondfo test at 17 DPO is a meaningful result. HCG at 17 DPO typically ranges from 400–1200 mIU/ml — well above the 25 mIU/ml sensitivity of Wondfo in most cases.
If you are seeing a faint line at 17 DPO on Wondfo it is very likely a true positive, particularly if the line has pink colour and appeared within the 5 minute reading window. Retest in 48 hours with FMU and the line should be noticeably darker.
Wondfo uses pink dye. A true positive line on Wondfo at 17 DPO will be pink in colour — even if very faint. The key things to look for are:
A true positive Wondfo line should have pink colour — even if very faint. A colourless grey line after the reading window is almost certainly an evap. The line should appear within the allotted reading time to be considered valid.
Wondfo is well known for producing evaporation lines — particularly on the strip format. An evap line on Wondfo typically appears after the 10 minute reading window, has no pink colour, and appears grey or colourless. Always read your Wondfo test within 10 minutes.
Wondfo strips are well known for producing evaporation lines particularly after the 5-10 minute reading window. Some batches have been reported to produce false positives. The indent line on Wondfo strips is visible and commonly mistaken for a positive. Always read within 10 minutes.
Wondfo has a high risk of indent lines.
An indent line is a colourless depression in the test strip where the test line would appear if positive. It is caused by the manufacturing process and is not a positive result. Key characteristics of an indent line on Wondfo:
- Has no pink colour — appears grey or colourless - Is visible on the dry test strip even before dipping - May become more visible on inverted or enhanced photos - Does not indicate pregnancy
Wondfo has a well documented indent line that is frequently discussed in the TTC community. If you are seeing a colourless line on your Wondfo test at any DPO, it is most likely the indent rather than a true positive.
At 17 DPO, typical HCG levels range from 400 to 1200 mIU/ml. This is a wide range because HCG levels vary significantly between women and between pregnancies.
Wondfo has a detection threshold of 25 mIU/ml. This means:
The Mayo Clinic notes that HCG roughly doubles every 48 hours in early pregnancy. If you retest in 48 hours the line should be noticeably darker if HCG is rising as expected.
By 17 DPO HCG levels are high enough to give an undeniable positive on virtually all tests. A negative at 17 DPO when your period has not arrived is very unusual and should be discussed with a doctor.
48 hours is the recommended retest window after a faint result at 17 DPO. This is because HCG roughly doubles every 48 hours in early pregnancy — retesting after this interval gives the best chance of seeing a meaningful change in line darkness.
Any urine sample should give a clear positive by 17 DPO.
When retesting:
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Yes — a faint line at 17 DPO on Wondfo with pink colour that appeared within the reading window is likely a true positive. Retest in 48 hours to confirm progression.
Yes. Wondfo has a sensitivity of 25 mIU/ml. Typical HCG at 17 DPO ranges from 400–1200 mIU/ml, so detection is possible in most pregnancies.
Evap lines on Wondfo typically appear after the reading window, have no pink colour, and appear grey or colourless. Wondfo has a high risk of evaporation lines. A true positive Wondfo line should have pink colour — even if very faint. A colourless grey line after the reading window is almost certainly an evap. The line should appear within the allotted reading time to be considered valid.
An indent line on Wondfo is colourless — it has no pink colour and appears grey. Wondfo has a high risk of indent lines. It is a depression in the test strip, not a positive result.
48 hours — Any urine sample should give a clear positive by 17 DPO.
Wondfo has a sensitivity of 25 mIU/ml — Other sensitive brands like FRER and Clearblue have similar or lower detection thresholds.
At 17 DPO, HCG typically ranges from 400–1200 mIU/ml. If you are on the lower end of this range or implanted later, your HCG may barely exceed Wondfo's 25 mIU/ml threshold, producing a faint line. Retest in 48 hours — a rising HCG will produce a darker line.
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