Pregnancy Test in London

A beta hCG (human chorionic gonadotropin) test is a blood test that measures the level of hCG in your bloodstream. This hormone is produced by the placenta shortly after a fertilised egg attaches to the uterine lining. hCG is commonly known as the “pregnancy hormone” because its presence is one of the earliest signs of pregnancy.

Healthcare professionals use the beta hCG test to confirm pregnancy, monitor its progression, or investigate concerns like bleeding or abdominal pain in early pregnancy. It can also be used to help diagnose and monitor certain medical conditions, including ectopic pregnancy, molar pregnancy, or even some tumours that produce hCG.

A beta hCG test can be taken as early as 10 days after conception, although it’s most accurate when done after a missed period. For women undergoing fertility treatment or IVF, doctors often schedule this test around 14 days after embryo transfer to confirm implantation.

In cases of suspected complications such as miscarriage or ectopic pregnancy, doctors may recommend serial beta hCG testing 48 hours apart to observe how levels change over time. A healthy pregnancy typically shows a doubling of hCG levels every 48–72 hours in early gestation.

The results of a beta hCG test are measured in milli-international units per millilitre (mIU/mL). A low or negative result usually means you’re not pregnant, while a high or rising value is a strong indicator of pregnancy. However, a single hCG value alone doesn’t provide the full picture.

Doctors often look at trends in hCG levels over time. A properly rising level usually points to a normal early pregnancy, while slow-rising or declining levels may indicate miscarriage or ectopic pregnancy. Interpretation should always be done by a healthcare professional, taking into account symptoms and ultrasound findings.

Our guide to hCG levels by week shows the typical range at each stage of pregnancy and explains why the trend matters more than one result.

Yes, a beta hCG blood test is a key tool in detecting ectopic pregnancies—where the embryo implants outside the uterus, most commonly in the fallopian tubes. In such cases, hCG levels may rise more slowly than expected or plateau, rather than doubling every 48–72 hours.

Doctors often combine beta hCG monitoring with transvaginal ultrasound scans to assess the location of the pregnancy. If the uterus is empty and hCG levels are above a certain threshold, it may suggest an ectopic pregnancy, requiring immediate medical attention.

Home pregnancy tests detect hCG in urine, while the beta hCG test is a blood test that provides an exact measurement of the hormone. Urine tests only indicate a positive or negative result, whereas blood tests offer quantitative information about how much hCG is present.

This makes the beta hCG test more sensitive and reliable, especially in early pregnancy or in cases where the pregnancy needs to be monitored closely. It’s also preferred in fertility clinics and hospitals to confirm successful embryo implantation after IVF. Our guide to pregnancy tests explains how home urine tests work and when to take one.

At most private clinics and laboratories in the UK, beta hCG blood test results are available on the same day, particularly if the sample is taken in the morning. NHS results may take slightly longer depending on local lab capacity.

Rapid turnaround is crucial when investigating early pregnancy concerns or when the test is used in fertility treatment. Some clinics, like the London Pregnancy Clinic, offer same-day reporting for appointments before 12:00 noon on weekdays.

Normal beta hCG levels vary widely in early pregnancy, but they typically range from about 5 to 426 mIU/mL at 4 weeks, and from 1,080 to 56,500 mIU/mL at 6 weeks gestation. Levels tend to double every 48–72 hours in the first few weeks.

However, a single hCG value isn’t enough to diagnose a healthy pregnancy. What matters more is how the levels increase over time, so doctors often repeat the test every two days to track the hormone’s progression. Read more

Yes, beta hCG tests are commonly used to monitor suspected miscarriage. If a pregnant person experiences bleeding or pain, serial hCG tests can help determine if the pregnancy is progressing normally or if there has been a loss.

Falling hCG levels or a plateau in hormone levels may suggest a miscarriage or a non-viable pregnancy. The results are often combined with ultrasound findings for a complete picture of the situation, enabling doctors to recommend the appropriate care. Beta hCG doubling time calculators are a good method to track normal levels of this hormone.

Although beta hCG is primarily associated with pregnancy, high hCG levels in men or non-pregnant individuals can signal certain medical conditions. These may include testicular cancer, ovarian tumours, or other rare types of hCG-secreting cancers.

In such cases, hCG is used as a tumour marker to help diagnose and monitor treatment response. If a man or a non-pregnant woman has unexplained hCG in their blood, further tests and medical evaluation are essential.