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Pregnancy Signs and Symptoms with Twins

Possible Symptoms of a Twin Pregnancy - Along With Alternative Explanations


Updated July 10, 2014

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Pregnant woman lying in bed
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Think you're experiencing twin pregnancy symptoms? Take this Could It Be Twins quiz!

Are you experiencing pregnancy signs or symptoms of twins? Maybe you've conceived with the help of fertility treatments, and you know your chances of having twins are higher. Maybe you have a family history of twins.

Or maybe there's no specific reason (that you know of) that increases your odds of conceiving twins, but you wonder about your pregnancy symptoms. You just feel pregnant with twins.

Many women wonder if they could be carrying twins, especially if their pregnancy symptoms are strong or they seem to be getting bigger faster. Women who are pregnant with twins do tend to experience certain pregnancy signs and symptoms more intensely than women carrying a singleton pregnancy.

That said, there are plenty of women who have no idea they are pregnant with twins until a doctor discovers it during an ultrasound or questionable lab result.

You can't diagnose a twin, triplet, or any multiple pregnancy based on symptoms. The only way to confirm a twin pregnancy is with ultrasound.

Keeping this in mind, here are some possible pregnancy signs and symptoms of a twin pregnancy.

Possible Twin Pregnancy Sign: Very Early Positive Pregnancy Test

If you get a positive pregnancy test result earlier than the day of your missed period, and the test is not an extra sensitive early-results test, you may suspect twins.

Other possible causes: You may have miscalculated your missed period, and not actually have taken the test too early. Also, if you ovulated earlier than you usually do, you may be further along than you think.

Possible Twin Pregnancy Sign: High hCG Levels

Women who are receiving fertility treatments are more likely to have their hCG levels tested frequently during the early days and weeks of pregnancy. This is not only to help confirm pregnancy success after treatment, but also to monitor whether the pregnancy is progressing normally or at risk.

If your hCG levels are very high, you may wonder if it's twins. The question, however, is what is considered "high" and what is "normal"? Levels of hCG can vary widely from pregnancy to pregnancy. For example, the American Pregnancy Association lists the normal hCG range at five weeks from your last menstrual period to be anything between 18 mIU/ml and 7,340 mIU/ml.

Other possible causes: hCG levels may appear higher than normal if conception occurred earlier than assumed. In rare cases, high levels of hCG may indicate a molar pregnancy.

Possible Twin Pregnancy Symptom: Intense Morning Sickness

Mothers of multiples may experience intense morning sickness. (Or perhaps I should say all-day sickness.) The nausea may also begin early, even before a positive pregnancy test comes back.

However, not all mothers of multiples experience intense morning sickness. Some lucky women carry two or more babies without ever feeling nauseated.

Other possible causes: Mothers of singletons can also experience intense morning sickness. In fact, about 1% of pregnant mothers of singletons will experience severe morning sickness, also known as hyperemesis gravidarum.

Possible Twin Pregnancy Symptom: Extreme Fatigue

Fatigue is a common early pregnancy symptom, and women carrying twins or more may feel doubly (or triply!) tired.

Other possible causes: Fatigue can be caused by a number of things, including trouble sleeping due to the excitement (or anxiety) of finally getting pregnant. If you're taking progesterone to help support the pregnancy, fatigue is a possible side effect.

Possible Twin Pregnancy Symptom: Weepiness or Mood Swings

It's like a scene out of the movies: a pregnant woman, holding a box of tissues, crying about a Hallmark commercial. Weepiness is a common pregnancy symptom, and moms of twins may be extra weepy.

Other possible causes: The emotional toll of fertility treatment is not to be underestimated. Pregnancy success is an anxiety ridden moment for many fertility challenged couples, many of whom worry about miscarriage. Also, like fatigue, weepiness can also be caused by the hormones taken to help support the pregnancy.

If the weepiness is interfering with your daily life, then it may be something more serious. Between 10 and 15% of women experience depression during pregnancy, known as antepartum or prenatal depression.

Possible Twin Pregnancy Sign: Growing Large Quickly

If you're "measuring large for dates" or gaining weight quickly, you may be carrying twins.

Other possible causes: If you've carried a pregnancy in the past, you're likely to show earlier. Don't be surprised if you look four months pregnant only six weeks past your last menstrual period.

It's also possible to measure bigger than expected if your baby is much bigger than average or if your date of conception has been miscalculated.

Don't forget to consider your diet, too. If you're gaining weight quickly, it may just be that you're taking in more calories than you need. Speak to your doctor for guidance on prenatal nutrition.

Possible Twin Pregnancy Symptom: Feeling Fetal Movement Early

Most women don't feel fetal movements until at least 18 weeks. Women expecting twins or more may report "fluttering" feelings earlier than this.

Other possible causes: It could be gas. Fetal movements early on are difficult to distinguish from gastrointestinal upset.

Possible Twin Pregnancy Sign: Two Heartbeats Heard on Doppler

Sometimes, a second heartbeat is picked up by the fetal Doppler during a prenatal check-up. It could mean twins.

Other possible causes: Or it could be an echo. Also, if you're using a fetal Doppler at home, you may actually be picking up your own heartbeat by accident. (Your own heartbeat should be much slower than the average fetus's heartbeat, but it still may be difficult for you to tell what you're hearing.)

The Bottom Line of Twin Pregnancy Symptoms or Signs

If you have every symptom on this list, and you also have a high chance of being pregnant with twins, the likelihood of a twin pregnancy is higher than normal - but still not certain.

Conversely, if you have none of the symptoms on this list, and no reason to suspect a higher chance of conceiving twins, then you're less likely to have a twin pregnancy - but it's not impossible!

The only way to confirm a twin pregnancy is with an ultrasound. If you suspect twins, speak to your doctor about your signs, symptoms, and concerns.

Wondering how many twin pregnancy symptoms you have? Take this Could It Be Twins? quiz! Or are you wondering if your odds for twins are higher than most? Then take this Chances of Having Twins Quiz!

More on pregnancy signs:

More on how to get pregnant:


Early Pregnancy - Including HCG levels and ultrasound findings. Advanced Fertility Center of Chicago. Accessed October 16, 2011. http://www.advancedfertility.com/earlypre.htm

Human Chorionic Gonadotropin (hCG): The Pregnancy Hormone. American Pregnancy Association. Accessed October 16, 2011. http://www.americanpregnancy.org/duringpregnancy/hcglevels.html

Molar Pregnancy. American Pregnancy Association. Accessed October 16, 2011. http://www.americanpregnancy.org/pregnancycomplications/molarpregnancy.html

Multiple Pregnancies: Twins, Triples, and More. American Pregnancy Association. Accessed October 16, 2011. http://www.americanpregnancy.org/multiples/multiples.html

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