It could be due to testing too early. HCG levels might not be high enough to be detected yet. Sometimes the test kits or lab procedures have inaccuracies too.
One possible reason for a negative urine test and positive blood test could be the difference in sensitivity of the two tests. Urine tests may not detect certain substances or conditions as early or accurately as blood tests. For example, in early pregnancy, the hormone levels might be detectable in the blood before they show up in urine. Another instance could be in some diseases where the concentration of biomarkers is too low in urine to be detected but sufficient in blood.
One cause could be the time factor. Some substances are detected in the blood earlier than in the urine. For example, if a new disease marker is emerging in the body, the blood circulation will carry it first, and it might take a while for it to be excreted into the urine in sufficient amounts to be detected. So, at the time of testing, the blood test shows positive while the urine test is negative.
The chapter of the Legend of Zhen Huan in the Harem, 6 Blood Test, can be found in the e-book Legend of Zhen Huan in the Harem. E-books could be found on various online reading platforms such as Qidian Chinese Network, Xiaoxiang Academy, etc. In the e-book, one could search for specific keywords to find the chapter of the novel 6 Blood Test. For example, you could enter keywords such as "Legend of Zhen Huan in the harem: 6 Blood Drop Matrimony Test" or "Legend of Zhen Huan in the harem: 6 Blood Drop Matrimony Test Chapter Name" to find the relevant chapter.
Well, there was a case where a lady got a negative result on her pregnancy test. However, she noticed her body changing in ways typical of early pregnancy, like breast tenderness. She decided to wait a week and retake the test. This time it was positive. The first false negative could have been due to testing too early. Hormone levels might not have been high enough for the test to detect at first.
One success story is that a young couple was really worried as they were not ready for a baby yet. When the pregnancy test came back negative, they were overjoyed. They could now focus on their careers and personal growth without the immediate pressure of starting a family. It was a huge relief for them.
One horror story is when the phlebotomist couldn't find a vein easily. They kept poking around in my arm with the needle, it was extremely painful and left my arm bruised for days.
Well, in the context of a Harry Potter fanfic about blood tests, it could be used to explore a character's heritage more deeply. For example, it might be a way to reveal hidden magical lineages or connections. Maybe it's a plot device to show how a character discovers they have a special blood trait that gives them an edge in magic, like being related to an ancient and powerful wizarding family.
Blood test is a classic line in Legend of Zhen Huan. It comes from episode 78. The following is the general content of the line:
Zhen Huan: Your Highness, you're right. This fetus isn't ours. We have to find a way to kill it.
Emperor: Zhen Huan, why do you say that? This fetus belongs to both of us. What evidence do you have to prove that it's not ours?
Zhen Huan: I have evidence, Your Highness. This fetus has our blood. You know the principle of blood test.
Emperor: Blood test is not a scientific way of proof. Why do you want to take the risk?
Zhen Huan: For our family, for our future. If we let this fetus live, then we will become the second pure Yuan Empress. This is something we can't accept.
Emperor: You are right, Zhen Huan. We won't let you become the second pure Yuan Empress. We're going to let this fetus die. We're going to lock you up in the cold palace.
Zhen Huan: Your Highness, can you calm down a little? We can't lose our freedom and dignity because of a fetus.
The Emperor: You are threatening me. I won't let you go this far. I'll give you a satisfactory answer.
Zhen Huan: I don't need answers, I just need freedom. I will fight until I get the respect I deserve.
That was the general content of the blood test.