How soon after cohabitation can pregnancy be tested?

Patient's question:

After cohabitation for a few days, I took an early pregnancy test. My last period was on the 4th of last month. I used to have it early before, but it hasn't arrived yet. Can I use a test strip to check for early pregnancy now?

Doctor's answer:

The blood test results are very early and accurate. About 10 days after intercourse, the results become reliable. If you are doing an early pregnancy test, the urine test needs about half a month. Generally, 7 days after intercourse, the fertilized egg implants, and around the 8th day, the blood test numbers should rise. As soon as the earliest time, breast tenderness may begin to appear. Now, it's important to rest well and check a urine routine or blood test for hCG in 10 days.
Blood tests for pregnancy do not require fasting. A blood test is one of the methods for pregnancy testing, mainly diagnosing pregnancy through HCG in the blood. However, to ensure accuracy, it is still recommended to fast. The time required for a blood test for pregnancy is not long, taking about two to three minutes.

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