First To Know® is a diagnostic test used for the early detection of the pregnancy hormone beta-hCG in the blood. First To Know® is easy to use and gives you a reliable result in the privacy and comfort of your home.
How First To Know® works
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.
What is the minimal concentration of beta hCG detected by First To Know®?
First To Know® detects beta-hCG concentration at a minimum level of 10 mIU/ml.
Is it important to do the test at a particular time of the day?
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.
How long do I have to wait before reading the result?
The result can be read after 10 minutes. Do not read the result after 30 minutes.
Can First To Know® give false negative results?
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.
Can First To Know® give false positive results?
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.
Can medications, drugs, or alcohol interfere with the test result?
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.
If the test is negative, but there is no menstruation?
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.
If the test is positive, but menstruation arrives?
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.