Cramps During Pregnancy: What's Normal & When to Worry

Cramps during pregnancy are common and can occur at various stages, usually as a result of normal physical changes. In early pregnancy, they may be related to embryo implantation, while later on, cramps can be caused by Braxton Hicks contractions or by the body’s preparation for labor.

In most cases, cramps during pregnancy are mild and improve with simple measures like rest, hydration, or a warm bath. However, severe cramps or those that come with symptoms like vaginal bleeding, fever, or dizziness may be linked to conditions such as ectopic pregnancy, miscarriage, or placental problems.

The causes of cramps during pregnancy can vary by trimester, ranging from normal ligament stretching to infections or early labor. Persistent, worsening, or unusual cramps should be evaluated promptly to rule out serious complications and ensure proper care.

First trimester

The most common reasons for cramping during the first trimester of pregnancy (weeks 1 to 13) include:

1. Implantation

Mild cramping in early pregnancy is common and often occurs when the embryo implants in the uterus. This usually takes place around 6 to 12 days after fertilization and may be accompanied by light implantation bleeding that lasts for about two days.

During this phase, the fertilized egg attaches to the uterine lining and begins dividing into embryonic cells. This process stimulates the body to produce the hormone beta-hCG, which can cause early pregnancy symptoms such as nausea, breast tenderness, or fatigue. These can sometimes be mistaken for PMS symptoms.

What to do: Rest and relaxation are generally enough to ease the discomfort. The cramps typically improve on their own within a few days.

2. Ectopic pregnancy

An ectopic pregnancy happens when a fertilized egg implants and begins to grow outside the uterus, most often in one of the fallopian tubes. This condition can cause sharp or severe cramping on one side of the lower abdomen, which may worsen with movement.

Cramping from an ectopic pregnancy is often accompanied by other symptoms, such as vaginal bleeding, pain during sex (dyspareunia), dizziness, nausea, vomiting, or fainting.

What to do: If you suspect an ectopic pregnancy, go to the nearest emergency room immediately for evaluation. If confirmed, treatment will begin right away and typically involves removing the embryo and, in some cases, the affected fallopian tube.

3. UTI

Urinary tract infections (UTIs) are common during pregnancy and may not cause noticeable symptoms in the early stages. When symptoms appear, they may include pelvic cramps, burning during urination (dysuria), difficulty urinating, a constant urge to urinate despite passing little urine, as well as fever and nausea.

UTIs are more common early in pregnancy, but they can occur at any stage. Pregnant people are more susceptible because certain body changes create conditions that allow bacteria to grow in the urinary tract.

What to do: You should see your OB-GYN or midwife for a urine test to confirm whether an infection is present and to begin treatment with antibiotics if needed. Your provider may also recommend getting plenty of rest, drinking more fluids, and avoiding holding your pee.

According to the American College of Obstetricians and Gynecologists (ACOG), UTIs in pregnancy should be evaluated and treated promptly because untreated infection can lead to more serious complications, including kidney infection.

4. Subchorionic hemorrhage

A subchorionic hemorrhage (also called a subchorionic hematoma) occurs when blood collects between the placenta and the uterus due to a partial detachment of the gestational sac from the uterine wall. This condition can cause symptoms such as cramping, vaginal bleeding, or abdominal pain.

It most often occurs during the first trimester and, in mild cases, may resolve on its own by the end of the second trimester as the bleeding is gradually reabsorbed by the body. However, larger hematomas are linked to a higher risk of complications, including premature birth, miscarriage, or placental abruption.

What to do: You should go to the nearest hospital for an ultrasound to determine whether any intervention is necessary.

Treatment usually involves partial or complete rest, avoiding sexual activity, and, in some cases, hormonal therapy with progesterone prescribed by a doctor or midwife. It is also important to drink at least 2 liters of water per day.

5.  Miscarriage

Miscarriage can cause intense cramping in the lower abdomen, pelvis, or lower back, often accompanied by heavy vaginal bleeding that may contain clots or tissue. The bleeding typically worsens over several days. Other symptoms such as fatigue or general malaise may also be present.

A spontaneous miscarriage most commonly occurs during the first trimester but can also happen in the second trimester, before 20 weeks of pregnancy.

In many cases, the exact cause is unknown, but certain factors may increase the risk, such as infections, hormonal or chromosomal abnormalities, use of certain medications, consumption of some herbal teas, excessive physical strain, or physical trauma.

What to do: You should go to the emergency room immediately if you experience signs of a miscarriage so that appropriate tests, such as an ultrasound and an assessment of the fetal heartbeat, can be performed to confirm the diagnosis.

If a miscarriage is confirmed, the doctor may recommend treatment such as medication to help expel tissue or a procedure like uterine curettage (D&C) or surgical evacuation to remove remaining tissue from the uterus.

Second trimester

The most common reasons for cramping during the second trimester of pregnancy (weeks 14 to 27) include:

1. Round ligament pain

Round ligament pain can cause cramping on one or both sides of the lower abdomen. The discomfort may last from a few seconds to several minutes and often appears when a pregnant woman changes position quickly, coughs, or sneezes.

This pain occurs because the ligaments that support the uterus stretch and tighten as the uterus grows. It is considered a normal and common part of pregnancy.

What to do: Maintain good posture and avoid spending long periods standing or sitting. Changing positions frequently when lying down can also help reduce and prevent discomfort.

Light stretching and gentle exercises such as yoga or Pilates (if approved by your doctor or midwife) can strengthen your muscles and may ease discomfort later in pregnancy. However, if the pain does not improve or if you develop a fever, you should contact your provider right away.

2. Placental abruption

Placental abruption occurs when the placenta detaches from the wall of the uterus, often due to inflammation or changes in blood flow within the placenta. This condition usually causes intense abdominal or lower back cramps and vaginal bleeding and is more common after 20 weeks of pregnancy.

Placental abruption may also result from factors such as intense physical exertion, high blood pressure, or preeclampsia.

What to do: Placental abruption is a life-threatening emergency that requires immediate medical attention. Go to the hospital right away so that treatment can begin, which may include hospitalization, oxygen therapy, and careful monitoring of blood pressure and heart rate.

In severe cases or when the mother or baby is at risk, urgent delivery by cesarean section may be required.

3. Braxton-Hicks contractions

Braxton Hicks contractions can begin around the 20th week of pregnancy. They are mild, irregular contractions caused by the uterine muscles tightening and relaxing. These contractions make the belly feel firm or tight at certain times of the day. Their purpose is to help the uterus and pelvic tissues prepare for labor.

Also recommended: Why Your Pregnant Belly Is Hard Sometimes (Causes By Trimester) tuasaude.com/en/can-a-hard-abdomen-be-a-contraction-sign

What to do: Gentle physical activity or light exercise, if approved by your doctor or midwife, can help relieve the discomfort caused by Braxton-Hicks contractions.

However, if the contractions become strong, occur very frequently, or are accompanied by symptoms such as back pain, vaginal bleeding, or unusual discharge, you should seek medical evaluation immediately.

Third trimester

The most common reasons for cramping during the second trimester of pregnancy (weeks 28 to 41) include:

1. Constipation

Constipation is common during pregnancy, particularly in the third trimester, and occurs due to hormonal changes that slow intestinal movement, mainly from increased progesterone levels.

The growing uterus also puts pressure on the intestines, further reducing bowel motility. This can cause colicky pain (often on the left side), abdominal discomfort, excess gas, and a sensation of hardness in the abdomen.

According to the ACOG, these changes are normal during pregnancy but can often be relieved with proper hydration, physical activity, and a high-fiber diet.

What to do: Stay well hydrated by drinking at least eight glasses of water per day. Include plenty of fiber in your diet from whole grains, fresh fruits, and vegetables. Regular physical activity, as approved by your healthcare provider, can also help stimulate intestinal movement and ease constipation.

You should contact your OB-GYN or midwife if the pain does not improve within the same day, if you go more than two days without a bowel movement, or if you develop other symptoms such as fever or worsening abdominal pain.

2. Preeclampsia

Preeclampsia is a condition characterized by a sudden rise in blood pressure during pregnancy, most often occurring in the second half or third trimester. It may cause symptoms such as pain or cramping in the upper right side of the abdomen, nausea, headache, swelling of the hands, legs, and face, and blurred vision.

Preeclampsia is a serious complication that requires prompt medical attention, as it can be life-threatening for both the mother and the fetus.

What to do: If you notice symptoms of preeclampsia, you should seek medical care immediately. According to ACOG, warning signs of preeclampsia can include headache that does not go away, vision changes, swelling of the face or hands, nausea, and pain in the upper right abdomen.

Contact your OB-GYN or midwife or go to the emergency room so your blood pressure can be checked and treatment started right away to reduce the risk of serious complications for you and your baby.

3. Premature labor

Cramps that occur after 37 weeks of pregnancy and gradually increase in intensity, become regular, and do not improve with changes in position may be a sign of premature labor.

These cramps may be accompanied by other signs of labor, such as pelvic pressure, vaginal discharge or light bleeding. 

What to do: If you think you are having labor contractions, contact your OB-GYN or midwife and go to the hospital right away.

Warning signs

It is important to contact your OB-GYN or midwife, or go to the nearest emergency room, if you experience persistent cramps or if cramping occurs with any of the following symptoms:

• Vaginal bleeding
• Fever or chills
• Nausea or vomiting
• Pain or burning during urination
• Blood in the urine
• Headache
• Swelling of the hands, feet, or face

These symptoms may be signs of a serious complication that requires immediate medical evaluation and treatment.

Also recommended: Bleeding During Pregnancy: Causes (by Trimester) & What to Do tuasaude.com/en/bleeding-during-pregnancy