Best answer: Why was my home pregnancy test negative but my blood test positive?

The hook effect happens when you have too much hCG in your blood or urine. How is this possible? Well, the high levels of hCG overwhelm the pregnancy test and it doesn’t bond with them correctly or at all. Rather than two lines saying positive, you get one line that incorrectly says negative.

Is it possible to have a positive blood pregnancy test and not be pregnant?

It’s possible to have a positive pregnancy test even if you aren’t technically pregnant. This is called a false positive. It’s sometimes caused by a chemical pregnancy. A chemical pregnancy occurs if a fertilized egg, known as the embryo, is unable to implant, or grow, very early on.

Are blood tests more accurate than pregnancy tests?

Blood test results are about 99 per cent accurate and can detect lower amounts of hCG than urine pregnancy tests. The two main types of blood pregnancy test include: Quantitative blood test – measures the exact amount of hCG in the blood and can give you an estimate of how far along the pregnancy has progressed.

Can you use blood on a home urine pregnancy test?

Conclusion: Using a standard point-of-care qualitative hCG immunoassay kit, whole blood may be used for rapid detection of pregnancy with similar, or greater, accuracy than urine.

How long does it take for hCG to show up in blood?

hCG blood levels by week



Low levels of hCG may be detected in your blood around 8 to 11 days after conception. hCG levels are highest towards the end of the first trimester, then gradually decline over the rest of your pregnancy.

Can a pregnancy test be negative one day and positive the next?

After getting a negative result on a home pregnancy test, it’s fair to conclude that you’re not pregnant. However, if you happen to glance back at the test later in the day, you may be surprised to see that a positive line has magically appeared.

Can a urine pregnancy test be wrong?

In very rare cases, you can have a false-positive result. This means you’re not pregnant but the test says you are. You could have a false-positive result if you have blood or protein in your pee. Certain drugs, such as tranquilizers, anticonvulsants, hypnotics, and fertility drugs, could cause false-positive results.

How many hours does it take for hCG to build up in urine?

Follow the Pregnancy Test’s Instructions



You may choose to test before the week is up, knowing that hCG nearly doubles every 48 hours.

How early can a doctor detect pregnancy with urine?

The hormone can be detected by a pregnancy blood test about six to eight days after conception and by a urine test after ten days.

What are some unusual signs of early pregnancy?

Some weird early signs of pregnancy include:

• Nosebleeds. Nosebleeds are quite common in pregnancy due to the hormonal changes that happen in the body. …
• Mood swings. …
• Headaches. …
• Dizziness. …
• Acne. …
• Stronger sense of smell. …
• Strange taste in the mouth. …
• Discharge.

How early does your stomach get hard when pregnant?

During the early stages of pregnancy, around 7 or 8 weeks, the growth of the uterus and the development of the baby, turn the the belly harder.

How does your stomach feel in early pregnancy?

The pregnancy hormone progesterone can cause your tummy to feel full, rounded and bloated. If you’re feeling swollen in this area, there’s a possibility you could be pregnant.