1. Test paper type (also called "pregnancy test paper", "early pregnancy test paper", "early pregnancy test paper", etc., different manufacturers have their own different names);
2. Box-type (also called "pregnancy test box", "pregnancy test card" and "early pregnancy kit". );
3. Rod shape (also called "pregnancy test stick", "pregnancy test pen", "early pregnancy test pen" and so on).
The name is very miscellaneous, but in essence, the type of test paper is the basis of the other two products, and it is also the most original pregnancy test product. It is a pregnancy test paper loaded with various reagents. By qualitative or semi-quantitative detection of HCG (human chorionic gonadotropin) in urine, you can determine whether you are pregnant or estimate the number of weeks of pregnancy. Its principle is immune colloidal gold technology, which existed in 1970s and 1980s. At present, it is not known who first used it for early pregnancy detection.
To put it bluntly, the box pregnancy test product is an upgraded version of the test paper type. Early test paper products were bare test strips. When non-professionals use it, it is very easy to make operational mistakes, resulting in inaccurate results. Moreover, for enterprises, its profit is too low. The solution is to cover the pregnancy test paper with a plastic shell and attach a dropper for sample addition, which protects the test paper. Secondly, the sample adding method is changed to ensure the accuracy of sample adding and the probability of operation error.
However, the small error probability does not mean that it is gone. At the same time, the box-type pregnancy test products also exposed some defects such as complicated operation. Therefore, after summarizing the advantages and disadvantages of the above two products, the rod-shaped product was invented. The core of pregnancy test stick is also pregnancy test paper, but the use of pregnancy test stick is simpler and more convenient, and it can be used directly after unpacking, without the complicated steps of collecting urine first and then adding samples. The difference here is that the difference between strip products and pen products is that there is a cover without a cover. The stamped product is called a "pregnancy test pen", and its head has a special absorbent paper, which can absorb urine. The uncovered product is called "pregnancy test stick". The absorbent paper of the pregnancy test stick is partially wrapped in a plastic shell, which has its own advantages and disadvantages. It is worth mentioning that after the invention of rod-shaped products, almost all the defects and deficiencies of test paper and box-shaped products have been made up, and the profits have also increased to the level that both enterprises and retailers are satisfied with, and consumers have also bought it. This is simply a product that satisfies all parties!
In addition, the question about "who invented xxx" is empty talk. Legally speaking, it depends on who owns the relevant invention patent. The law only recognizes invention patents in black and white! Log in to China patent inquiry system and search for the words "pregnancy test stick", and the following results are displayed:
It can be seen that the earliest invention patent of "pregnancy test stick" appeared in 2003.