When should I start an HPT (Home Pregnancy Test)?
A few factors have impacts on the first day you can find a positive result.
- Sensitivity of a testing product is very important. Taking advantage of the increased sensitivity of our products, you can detect a positive result as early as 3-4 days past implantation which occurs (generally speaking) between 5 and 10 DPO.
- The speed of the production of hCG differs among women.
- Frequency of urination can influence the result. It is recommended to use the first urine of the day, or use the urine hold for 3 to 4 hours. The more hCG accumulates in urine, the more possible you can have a correct positive result.
- The time of endometrial implantation of the blastocyst is another factor. The blastocyst normally forms on day 5 after fertilization.
- The location of blastocyst implantation can influence rate of hCG production and thus have an impact on the testing result.
- Regularity of period also may result in a different result. It is recommended to maintain a bbt chart, so accurate key days can be determined and then a good testing date can be scheduled.