The calculator aims to monitor the increase in the growth of the pregnancy hormone to reassure you in the first weeks.

In the early stages of pregnancy, ultrasound may not provide accurate information about the healthy growth of the pregnancy.
This is because the embryos in the early stages are very small microscopically.
Ultrasound may not be able to accurately determine the safety of the pregnancy.
The pregnancy hormone can be relied upon as a means of ensuring the healthy growth of the pregnancy
As well as to rule out, God forbid, miscarriage, molar pregnancy, or ectopic pregnancy

(The calculator is not a substitute for a medical examination and the calculator may not provide information with a high degree of accuracy. It is always preferable to consult your doctor.)