First To Know® detects the presence or absence of the pregnancy hormone (beta-hCG) in the blood. This pregnancy hormone is produced by the placenta as soon as the fertilized egg implants in the uterus. If a pregnancy has occurred, the pregnancy hormone level doubles every two or three days. The maximum level is reached at 8-10 weeks after the last menstrual period. To perform First To Know® you need just a drop of blood, obtained from the puncture of your fingertip with a small needle (included in the box). First To Know® can detect minimal quantities of the pregnancy hormone, present in the blood drop. The sensitivity and the ability to use blood are characteristics of First To Know®, which allows a reliable result after only the 7th- 8th day post conception.
First To Know® detects beta-hCG concentration at a minimum level of 10 mIU/ml.
No. First To Know® can be performed at any hour of the day, because the hormone concentration in the blood is not related to fluid intake.
The result can be read after 10 minutes. Do not read the result after 30 minutes.
Yes. A false negative result may happen if First To Know® has been done less than one week after conception. If the test is negative but a pregnancy is suspected, simply repeat a test after a few days.
Yes. A false positive result may happen if the woman has taken a medication containing beta-hCG for ovulation induction or in IVF programs, or very rarely, in the case of ovarian cysts producing beta-hCG. A positive test indicates a pregnancy with reasonable certainty. On the other hand, as previously said, a negative test does not exclude a pregnancy, if the conception has happened less than 7 days before taking the test.
No, except beta-hCG used for ovulation induction or in IVF programs. In this case, First To Know® may be done two weeks after conception.
The test may be repeated after a few days: it is possible that there has been a delay in ovulation (and therefore in the possible conception) and the hormone beta-hCG is not yet in the bloodstream or the woman may have forgotten the day when her period is due. If after 45-50 days the menstrual period has not occurred and the test in negative, it is advisable to seek medical advice.
This case is called “chemical pregnancy”: it means that a very early miscarriage has occurred. The majority of chemical pregnancies happen because of chromosomal anomalies or failed implantation. It is a very common event and does not mean that the couple is infertile, but if it happens many times, it is advisable to seek medical advice.
First To Know® is a medical device DIV CE. Before performing the test, thoroughly read the instructions and directions for use, located inside the package.
Do not take any initiative based on the content of this site, this is for informational purposes only and does not substitute medical advice. If you have any doubt concerning your health, you must ask your doctor.