hCG Levels by Week: Normal Range Chart & What Your Number Means

From the moment an embryo implants, your body starts producing human chorionic gonadotropin — or hCG — the hormone that turns a pregnancy test positive and helps support early pregnancy. These hCG levels by week can offer clues about how things are progressing, but here’s the catch: they vary wildly from person to person.

So before you start comparing numbers, take a breath — there’s a wide range of what’s considered normal. Here’s a clear hCG levels chart by week of pregnancy to help you understand what those numbers mean, plus when (and when not) to worry.

📝 In this article:\

What Is hCG?

hCG is Human chorionic gonadotropin, often referred to as “the pregnancy hormone” because it’s at its highest levels during pregnancy. It’s produced by the placenta after the fertilized egg implants in your uterus. [1]

Fun fact: a pregnancy test works (like this highly-rated one on Amazon) by detecting hCG in your urine. The catch? It requires high levels for a BFP (big fat positive), so an at-home pregnancy test taken too early might not pick up your rising hCG.

To avoid a false negative (and that pinch of disappointment), it’s recommended to wait until around the time of your expected period. Even better is opting for a blood test, since there’s more hCG in your blood than in your urine. It all depends on your excitability (and your budget). You could always do both. [2]

Why is hCG important?

When you get pregnant, hCG helps to build up the lining of your uterus (making a cozy home for your fertilized egg) and tells your ovaries to stop ovulating. The ability to measure hCG can also provide vital information for identifying a normal pregnancy and a pathologic pregnancy. [1]

Far from the small stuff!

All you need to grasp right now is that a rapidly increasing hCG level, especially in the first trimester, is a good sign of a developing embryo. Likewise, low hCG levels in pregnancy could indicate some potential pregnancy-related complications, including possible pregnancy loss.

How do you actually get an hCG number?

Here's something that trips a lot of people up: a home pregnancy test can't give you a specific hCG number. It's only built to tell you yes or no. That little test strip is looking for hCG above a certain threshold, and once it hits that, you get your line — but it's not measuring how much hCG is actually in there.

Some people try to read the tea leaves through line progression — watching the test line get darker over a few days as a sign hCG is climbing. It's not nothing, but it's not a number either, and things like how concentrated your urine is or what time of day you test can throw the darkness off without your hCG actually changing.

A few urine tests, like digital tests with a "weeks indicator", get a little closer — they're calibrated to change their reading at certain hCG thresholds, so they can give you a rough estimate of how far along you are. Still not an exact figure, though.

If you actually want a number — like the ones in the chart below — you need a blood test, done at your doctor's office or a lab. It's the only method that measures your exact hCG level in mIU/mL, which is also why it's what doctors use to track whether your levels are doubling appropriately. So if you're staring at a positive home test wondering what your "real" number is, that question can only be answered one way.

## hCG levels week by week

You might be thinking that measuring your hCG levels throughout your pregnancy is a must for ensuring all is progressing as it should be. But, according to Dr. Kiarra King, this isn't actually true: "Most of the time we don't check HCG levels routinely. It's typically in the case of determining the viability of a pregnancy, and assessing for conditions such as ectopic pregnancy."

But typically, after conception, it’s perfectly normal for your hCG levels to rise as your body prepares for the months ahead. Once the placenta is formed, your hCG levels will begin to fall. It’s all good, it just means that with progesterone picking up the slack, hCG can take a back seat.

So lets look at these early variations in closer detail:

You can see that the hormone level goes up and up and up until about week 12, then it starts to decline. The decline might be one reason that morning sickness tends to ease up at the end of the first trimester.

What are normal hCG levels at 4 weeks?

hCG levels at 4 weeks pregnant are typically 5 to 426 mIU/mL — yes, that's a huge range, and yes, that's normal. If your number's on the lower end, don't panic-Google yet: ovulation can happen later than you think, which pushes your "true" pregnancy age a few days behind your period-based due date. The number that actually tells you something is the one two days from now.

What’s a normal hCG level at 5 weeks?

hCG levels at 5 weeks should land around 18 to 7,340 mIU/mL. If that spread feels almost insultingly wide, that's because it is — a healthy pregnancy at 5 weeks could show a number anywhere in there. What matters is whether it's roughly doubling every 2 to 3 days, not which end of the range you're on.

What should hCG level be at 6 weeks?

By 6 weeks, hCG levels usually climb to 1,080 to 56,500 mIU/mL — this is often around when doubling starts to slow down a little, which is completely expected and not a sign anything's wrong. This is also roughly the window where an ultrasound can start picking up a heartbeat, if you're looking for the next milestone to watch for.

What level of hCG indicates pregnancy?

Generally, an hCG level of 25 mIU/mL or higher means you're pregnant. Anything under 5 mIU/mL is considered a negative, non-pregnant result — and anywhere in between is a gray area your doctor will likely want to retest in a couple of days.

This is why a blood test can catch a pregnancy earlier than a pee-on-a-stick test at home: blood tests pick up much lower hCG levels, while urine tests usually need your hCG to hit 10 to 25 mIU/mL before they'll show that second line. So if you tested too early and got a negative, it's not necessarily a no — it might just mean your levels haven't climbed high enough yet.

## What does your hCG number actually mean?

Here's the thing charts can't tell you: there's no single "right" number. A healthy pregnancy at 5 weeks could show an hCG of 200 or anywhere up to an hCG of 5,000. Both are normal. What your doctor actually cares about is the trend — is it roughly doubling every 48 to 72 hours — not where you land in the range.

Low hCG levels

Some women have lower levels or their levels don’t increase as quickly as they “should,” but their pregnancy is still perfectly healthy. Sometimes a low hCG level just means that you’re earlier in pregnancy than you thought.

But sometimes a low hCG level or especially a decreasing level can be a sign of pregnancy loss. If you’re having bleeding or other miscarriage symptoms, your doctor might test your hCG levels to see what is going on. The number that matters is your next one — if it's rising the way it should, low-but-rising is usually just... low. [3]

High hCG levels

High hCG levels could mean that you’re farther along in pregnancy than you thought. It could also mean — surprise! - you’re having twins!

If you get a positive on a pregnancy test very early, like 8 days after ovulation, that might mean your hCG levels are very high due to a twin pregnancy. But the only way to be sure you’re having twins is to get an ultrasound.

High hCG shows up with twins, a slightly further-along pregnancy than expected, or simply because your body runs high — some people just do. An early ultrasound (once you're far enough along for one to be useful) will tell you more than the number alone ever can. [3,4]

High hCG levels could also indicate other extremely rare issues, like a tumor or a molar pregnancy. In any case, it’s best not to hazard a guess on your own (or put your mind into a spin). A healthcare professional will be able to guide you no matter your concerns. [5]

hCG dropped between tests

This is the one worth calling your doctor about, especially alongside bleeding or cramping. Although chances are, they’ll be in touch with you to chat through the results. A single low or slow-rising number isn't a diagnosis, but a doctor tracking it alongside your symptoms can tell you what's actually going on.

One hCG number is a snapshot, not the whole picture. If you're anxious about yours (we get it, the two-week wait turns everyone into an amateur statistician), the most useful thing you can do is get it retested in 48 hours and watch the trend, not the digit.

What kind of hCG levels indicate a miscarriage?

There's no single number that spells miscarriage — it's really about the pattern. In a typical early pregnancy, hCG roughly doubles every 48 to 72 hours. A miscarriage is more likely when levels plateau instead of rising, climb much slower than expected, or start dropping instead of going up. [3]

Doctors usually confirm this with more than one blood draw, since a single hCG result can't show you which direction things are heading. If your levels are falling based on where you are in your pregnancy, or a follow-up test shows a level lower than expected for your gestational age, your doctor may talk to you about miscarriage, an ectopic pregnancy, or fetal loss — and from there, next steps and support. 🤍

Can hCG levels go down and not miscarry?

Yes — actually, a drop is expected at a certain point. hCG climbs fast through the first trimester, peaks somewhere around weeks 8 to 11, and then naturally declines for the rest of pregnancy. If your levels are falling after that peak, that's not a red flag — it's just your hormones doing exactly what they're supposed to.

Where it gets more nuanced is before that peak. A small dip on a single early test isn't automatically a crisis either — lab variation, testing at different times of day, or even how diluted your urine sample was can all shift a number slightly. What your doctor is really watching for is a consistent, confirmed drop across more than one test, not one number that looks a little lower than you expected. If you're worried, the most useful thing you can do is get retested and let the trend (not the single digit) tell the story.

When it comes to your health, no worry is too small to bring up. You know your body better than anyone.

## When does hCG stop doubling?

hCG stops doubling every 2 to 3 days around 6 to 7 weeks, once levels get into the tens of thousands. After that, it keeps rising, just more slowly, until it peaks around weeks 8 to 11 — then it actually starts to fall for the rest of your pregnancy. That drop is one theory behind why morning sickness tends to ease up as the first trimester ends.

What are signs your hCG is rising?

There's no symptom that measures your exact hCG number (that's what blood tests are for), but as hCG climbs in early pregnancy, most people start noticing a familiar lineup:

• Nausea, with or without vomiting: AKA morning sickness, though it definitely doesn't check the clock. It usually shows up before 9 weeks and tends to ease by 14.
• Breast tenderness or swelling: Sometimes one of the very first signs, showing up as early as 1 to 2 weeks after conception.
• Fatigue: The "hit-a-wall-at-2pm" kind, often noticeable within the first week or two.
• Frequent urination: Your kidneys are filtering more blood as your body ramps up for pregnancy.
• Headaches: Courtesy of that sudden hormone surge.

These symptoms aren't hCG acting alone — progesterone and estrogen are rising right alongside it and driving a lot of the same effects. And plenty of totally healthy pregnancies come with barely any symptoms at all, so their absence isn't a red flag either. If you want to actually know where your hCG stands, a blood test is still the only way to get a real number.

Well, now you can add hCG to your vastly expanding knowledge of all things pregnancy. There are so many changes going on in your body, inside and out.

Wherever you are in your pregnancy journey, the Peanut community has your back. Day or night.