Abdominal pain in early pregnancy: what is normal and when to call

Abdominal pain in early pregnancy is usually harmless. In diary research, 85 percent of pregnant women recorded mild cramping in the first weeks. Severe pain on one side, pain in your shoulder or fainting do not belong to that. Then you call the same day.

That is the whole core of this article, and I am deliberately putting it at the top. The rest explains where those cramps come from and what they do and do not mean. And what a blood test can add. The last of those is less than you may hope.

When do you call straight away?

Call your GP or midwife the same day for severe pain on one side of the abdomen. Also for pain radiating to your shoulder, dizziness or fainting. And for abdominal pain together with bleeding that increases. These are the warning signs Thuisarts lists for an ectopic pregnancy and a miscarriage.

Outside office hours, call the out-of-hours GP service. Do not wait until tomorrow to see whether it passes.

A blood test does not belong on this list. With these complaints you need a doctor, not a number.

Is abdominal pain one of the first symptoms of pregnancy?

Yes, mild abdominal pain is one of the first and most common symptoms of pregnancy. In the American LIFE cohort, 341 women kept a daily diary from their positive test onwards. Between week 2 and 7, 85 percent recorded mild cramping low in the abdomen (PMID 26936888).

Those cramps come from somewhere. Your uterus starts to grow and receives more blood. The ligaments holding it in place stretch with it. And progesterone slows your bowel, which gives a bloated, pressing feeling.

The awkward part is that the same cramps also belong to an approaching period. Before implantation they are in fact exactly the same. Implantation falls 6 to 12 days after ovulation (PMID 10362823).

From the pain alone you cannot tell the difference. More on that in our main article on early pregnancy symptoms by day.

Is nagging abdominal pain normal during pregnancy?

Nagging pain low in the abdomen is normal in the first weeks of pregnancy. That holds as long as it is mild and sits on both sides or in the middle. And as long as it comes and goes.

It often feels like period pain. Pain that is sharp, stays on one side or gets worse is a different story.

The table below is how I would read it myself. Look at the combination, not at one feature.

The bleeding figure comes from a study of 4,510 pregnant women. Of them, 27 percent had some bleeding in the first trimester.

Only heavy bleeding was linked to a roughly threefold higher chance of miscarriage (PMID 19888046). That was 8 percent of the group. Light bleeding was not.

I am 5 weeks pregnant and have severe abdominal cramps. Should I be worried?

Severe abdominal cramps at 5 weeks are a reason to call your midwife or GP today. Especially if the pain is on one side or comes with bleeding. Mild, nagging cramps on both sides are not. The word "severe" is the signal here.

Say you are 5 weeks along and have had nagging cramps for two days, like period pain. They switch sides, without bleeding. That fits the 85 percent from the diary research.

Has the pain been sharp on the right since this morning, and do you feel light-headed? Then you pick up the phone.

If in doubt, call. A midwife answers this question every week, and better once too often than once too seldom.

What does an hCG blood test say about abdominal pain?

A single hCG value says nothing about abdominal pain. Two values two days apart say something about the course of the pregnancy. That is one of the things a doctor weighs with pain in the first weeks. A blood test never replaces a phone call when pain is severe.

What the course means has been measured well. Barnhart followed 287 women with a healthy ongoing pregnancy (PMID 15229000). Their hCG rose a median 124 percent per two days, and at least 53 percent. A rise that stays well below that fits less well with a healthy pregnancy in the uterus.

A slower rise is not a diagnosis. It also occurs in pregnancies that simply continue, and a normal rise does not rule everything out. That is why interpreting such a result belongs with your midwife or GP, together with a scan.

What a blood test can do is give you a number while you would otherwise wait. If you want that, you can have an hCG blood test done without a referral. How to compare two values is in our article on hCG doubling time.

Abdominal pain and a possible miscarriage

Cramps that increase and come with bleeding can belong to a miscarriage, but need not. In most women with light bleeding the pregnancy simply continues. What an early miscarriage is and is not, is in our article on early miscarriage symptoms.

I would sum it up like this. Pain without bleeding is rarely a miscarriage, and bleeding without pain not often either. The combination is a reason to call. Not to search online.

Sources

• Sapra KJ, Buck Louis GM, Sundaram R, et al. Signs and symptoms associated with early pregnancy loss: findings from a population-based preconception cohort. Hum Reprod. 2016;31(4):887-96. PMID 26936888.
• Hasan R, Baird DD, Herring AH, et al. Association between first-trimester vaginal bleeding and miscarriage. Obstet Gynecol. 2009;114(4):860-7. PMID 19888046.
• Barnhart KT, Sammel MD, Rinaudo PF, et al. Symptomatic patients with an early viable intrauterine pregnancy: HCG curves redefined. Obstet Gynecol. 2004;104(1):50-5. PMID 15229000.
• Wilcox AJ, Baird DD, Weinberg CR. Time of implantation of the conceptus and loss of pregnancy. N Engl J Med. 1999;340(23):1796-9. PMID 10362823.
• Thuisarts.nl (Dutch College of General Practitioners). Ik krijg misschien een miskraam; Ik heb een buitenbaarmoederlijke zwangerschap. Accessed 8 September 2026.

Lunara Health provides blood testing and explanation, not diagnosis. Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP or midwife.