When should I start an HPT (Home Pregnancy Test)?

A few factors have impacts on the first day you can find a positive result.

1. 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.
2. The speed of the production of hCG differs among women.
3. 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.
4. The time of endometrial implantation of the blastocyst is another factor. The blastocyst normally forms on day 5 after fertilization.
5. The location of blastocyst implantation can influence rate of hCG production and thus have an impact on the testing result.
6. 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.