Beta-hCG After Embryo Transfer: Test Timing and Next Steps

For daily life, medication and what to avoid in the days after transfer, see our article on what to pay attention to after embryo transfer. This article focuses on follow-up from the pregnancy test onwards.

When is the first beta-hCG test done?

The pregnancy test is usually a blood test 9-12 days after transfer. After a day-5 (blastocyst) transfer it may be planned slightly earlier, and after a day-3 transfer slightly later. The clinic running your treatment sets the test date. Tests done before that day can be falsely negative because the hormone has not yet risen enough.

Does the trigger injection affect the result?

If the trigger injection given for final egg maturation contained hCG, the hormone can remain measurable in blood and urine for one to two weeks afterwards, depending on the dose and the person. Home tests done during this time can be positive even without a pregnancy. In some treatments a low dose of hCG is also used as luteal phase support. The test date is therefore set with the medicines used in mind, and a blood test is preferred over home tests. In frozen embryo transfers an hCG injection is often not used; if you had one, discuss it with your clinic before testing.

How is the first result assessed?

A positive beta-hCG at the first test shows that the embryo has implanted. In general, a higher first value is associated with a higher chance that the pregnancy will continue, but there is no single "good enough value" for everyone. The level depends on the developmental day of the transferred embryo, how many days after transfer the test was done and individual differences, and clinics may use different thresholds based on their experience. It is therefore better to rely on your clinic's interpretation than to compare your result with other people's.

• Negative result: if the value is below the negative limit, a pregnancy has not occurred in this cycle. Your clinic will tell you when to stop support medication; a period usually follows within a few days of stopping.
• Low positive result: if the value is positive but lower than expected, the test is usually repeated 48 hours later to understand how the pregnancy is progressing.
• Positive result: most clinics ask for a second test 48-72 hours later to see the rise.

The repeat test and rate of rise

The change between two tests tells us more than a single value. In early pregnancy beta-hCG often doubles every 2-3 days, but in some healthy pregnancies the rise is slower, and the rise naturally slows as the level increases. For more on interpreting beta-hCG and doubling time, read our article on beta-hCG levels, and you can see the change between your two results with the beta-hCG doubling time calculator. The calculation is informative; your clinic assesses what the result means.

Biochemical pregnancy

When beta-hCG is positive and then falls before a pregnancy sac is seen on ultrasound, this is called a biochemical pregnancy. It is common both in IVF and in natural conception. Although it is a sad experience, it shows that the embryo was able to implant and is not on its own a negative sign for future attempts. If pregnancy does not occur or does not continue despite repeated transfers of good-quality embryos, a detailed assessment for implantation failure can be planned.

When is the first scan done?

In IVF pregnancies the gestational age can be calculated exactly from the transfer date. The first scan is usually planned about 2-3 weeks after the positive test, at around 6-7 weeks of pregnancy. It checks whether the pregnancy sac is inside the uterus, the number of sacs and the embryo's heartbeat. A heartbeat cannot always be seen at the first scan; in that case the scan is repeated a short time later.

Can an ectopic pregnancy happen after IVF?

Although the embryo is placed inside the uterus, it can rarely implant in the tube or elsewhere. A pregnancy inside and outside the uterus at the same time (heterotopic pregnancy) is very rare but somewhat more common after IVF than after natural conception. This is why it is important to confirm the location of the pregnancy with ultrasound after a positive beta-hCG. For details, see our page on ectopic pregnancy.

Progesterone support and bleeding

• Keep taking progesterone and any other support medication after a positive test until the week your clinic advises; do not stop on your own.
• Spotting or light bleeding is common in early pregnancy and does not always mean the pregnancy has been lost. If you bleed, contact your clinic without stopping your medication.
• If the second test or scan shows the pregnancy is not continuing, your clinic will plan how to stop the medication and the next steps.

The emotional side

Test day and the wait that follows are the most challenging part of treatment for many couples. Comparing results with online tables or other people's experiences often increases anxiety. Sharing your questions with your clinic and seeking psychological support when needed can help you through this time. Whatever the result, the next steps are planned together with your doctor.

When to seek help urgently

• Severe or one-sided abdominal pain, shoulder-tip pain, dizziness or feeling faint
• Bleeding as heavy as a period or heavier
• Marked abdominal swelling, shortness of breath or passing less urine (possible signs of ovarian hyperstimulation syndrome)
• A temperature above 38°C

Frequently Asked Questions

The information on this website is for general information only and does not replace a medical consultation.

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