In early pregnancy, hCG usually rises fast, almost doubling every three days for the first 8 to 10 weeks, and then slowly falls, according to Cleveland Clinic. A level above 25 mIU/mL usually means you are pregnant. Normal ranges are very wide, so how your level changes over two or three days tells your doctor more than one number.
What is hCG?
Human chorionic gonadotropin (hCG) is a hormone made by the placenta during pregnancy. It tells your body to keep making progesterone and stop your period. It is the hormone that pregnancy tests detect.
A urine test from the pharmacy only says yes or no. A quantitative blood test, often called beta hCG, measures the exact amount in your blood in mIU/mL (milli-international units per millilitre). According to MedlinePlus, hCG can appear in blood and urine as early as 10 days after conception.
What are normal hCG levels by week?
This table shows typical ranges by weeks since the first day of your last period. Source: Cleveland Clinic.
| Weeks since last period | hCG level (mIU/mL) |
|---|---|
| 3 weeks | 5 to 50 |
| 4 weeks | 5 to 426 |
| 5 weeks | 18 to 7,340 |
| 6 weeks | 1,080 to 56,500 |
| 7 to 8 weeks | 7,650 to 229,000 |
| 9 to 12 weeks | 25,700 to 288,000 |
| 13 to 16 weeks | 13,300 to 254,000 |
| 17 to 24 weeks | 4,060 to 165,400 |
| 25 to 40 weeks | 3,640 to 117,000 |
If you are not pregnant, your level is usually under 5 mIU/mL. Other sources publish slightly different ranges. MedlinePlus, for example, lists 217 to 8,245 mIU/mL at 5 weeks. Each laboratory sets its own reference range, so always read your result against the range printed on your report.
How fast should hCG rise in early pregnancy?
In a healthy early pregnancy, hCG almost doubles about every three days, and the rise slows as you near 10 weeks, when hCG peaks. After that, levels fall and stay lower for the rest of the pregnancy.
To check the rise, doctors take a first blood test as a baseline and a second one 48 hours later. An NHS early pregnancy leaflet explains that a level that rises well usually means the pregnancy is continuing. A level that falls a lot usually means the pregnancy is ending. A level that changes only a little needs more checks, because it can be a sign of an ectopic pregnancy.
Why can one hCG number be misleading?
A single hCG value is of limited use on its own, for these reasons:
- Ranges overlap a lot. A level of 5,000 mIU/mL fits both week 5 and week 6 in the table above.
- Your dates may be off. If you ovulated later than usual, your level will look low for your week.
- Healthy pregnancies can sit well below the average.
- Twins or triplets give higher levels.
- Results from two different labs may not compare exactly. Try to use the same lab for repeat tests.
A single hCG number cannot tell you how far along you are or where the pregnancy is. An ultrasound scan, together with the trend in your hCG, answers those questions.
What can a low hCG level mean?
A level that is low for your dates often means your dates are wrong and the pregnancy is earlier than you thought. Cleveland Clinic lists other possible causes:
- Miscarriage, or a threatened miscarriage
- Ectopic pregnancy, where the pregnancy grows outside the womb
- Blighted ovum, where a pregnancy sac forms without an embryo
A low result on its own does not diagnose any of these. Your doctor will usually repeat the test in two to three days or arrange an ultrasound.
What can a high hCG level mean?
A high level most often means you are further along than you thought, or you are carrying twins or more. Less often, it can point to a molar pregnancy, an abnormal growth of the placenta. Very rarely, high hCG comes from certain tumours, as MedlinePlus explains. Your doctor will usually follow a high result with an ultrasound.
When should you see a doctor about your hCG level?
See your doctor or obstetrician if your hCG is lower or higher than expected, or if it does not rise as expected between two tests. Ask for an ultrasound if you are unsure how many weeks pregnant you are.
Get urgent help if you are pregnant and have any of these:
- Pain in your lower tummy, especially on one side
- Vaginal bleeding that gets heavier
- Pain at the tip of your shoulder
- Feeling dizzy, faint or very light-headed
These can be signs of an ectopic pregnancy. Call 998 for an ambulance if you faint, or if the pain or bleeding is severe.
When should you retest hCG?
- If a home urine test is negative but your period has not come, test again after a few days or have a blood test.
- If your blood hCG is between 5 and 25 mIU/mL, repeat it in two to three days to see if it rises.
- If your doctor wants to see the rise, have the second test 48 hours after the first, ideally at the same lab.
Can you have an hCG blood test at home in Dubai?
Yes. A DHA-licensed Medilife nurse can take your blood at home, at your hotel or at your office, 24 hours a day. The pregnancy blood test (beta hCG) costs AED 250, including the nurse visit, and your result is sent privately to your phone or email. See pregnancy blood test at home for details. For other tests, see our home blood tests. This is useful when you need a repeat test 48 hours after the first and do not want to sit in a clinic.
Frequently asked questions
What hCG level confirms pregnancy?
A blood level above 25 mIU/mL usually means you are pregnant, and a level under 5 mIU/mL is usually negative. Results in between are unclear, so repeat the test in two to three days.
Is a blood test more accurate than a urine pregnancy test?
A blood test gives an exact number, so your doctor can track how your hCG changes over time. A urine test only gives a yes or no answer.
How long does it take for hCG to double?
In early pregnancy, hCG almost doubles about every three days, according to Cleveland Clinic. The rise slows as you approach 10 weeks, when hCG peaks.
Do I need to fast before an hCG blood test?
No. You do not need to fast or prepare in any special way. You can have the test at any time of day.
Can hCG levels tell me if I am having twins?
Twins and triplets often give higher levels, but hCG cannot confirm twins. Only an ultrasound scan can.
Is hCG used for other pregnancy tests?
Yes. hCG is part of some screening tests for Down syndrome in the first trimester. NIPT, a blood test from 10 weeks, is another screening option. See NIPT at home, or read how accurate NIPT is.
Need an hCG blood test or a 48-hour repeat test? Call or WhatsApp Medilife on +971 52 345 2647 to book a nurse to your home, hotel or office in Dubai for AED 250. You can pay by card, Apple Pay, payment link, Tabby or Tamara, and we give you an itemised invoice for your insurer.
Medically reviewed by Dr Marina Girgis, General Practitioner, DHA licence 71970809-004, on 7 November 2026.