At 11 weeks pregnant, you’re about two and a half months along and nearing the end of your first trimester, with just two weeks to go before the second trimester begins. Your baby measures roughly 1.5 to 2.5 inches from crown to rump (about the size of a lime) and weighs around 0.3 ounces.
Months, Trimester, and Due Date
Pregnancy math can feel confusing because months and weeks don’t line up neatly. Eleven weeks falls within the third calendar month of pregnancy. Doctors count from the first day of your last period, not from conception, so you actually conceived about nine weeks ago even though you’re “11 weeks pregnant.” That two-week gap trips up a lot of people.
A dating scan, typically done between 8 and 14 weeks, gives you the most accurate due date. Before that scan, any estimate is based on your reported cycle, which can be off by a week or more if your cycles are irregular. At your scan, the sonographer measures your baby from head to bottom to confirm how far along you are.
How Big Your Baby Is Right Now
At the start of week 11, the average crown-to-rump length is about 44 millimeters. By the end of the week (11 weeks, 6 days), that grows to roughly 54 millimeters. That’s a jump of nearly a centimeter in just seven days, which gives you a sense of how rapidly growth is happening. The common comparison is a lime: small enough to fit in the palm of your hand, but now recognizably human in shape.
Fingers and toes are separating, and the head still makes up a large proportion of the body. Tooth buds are forming under the gums, and the bones are starting to harden. The baby can open and close its fists and is beginning to move, though at this size you won’t feel anything yet.
The Baby’s Heartbeat
Your baby’s heart has been beating since around week 6, and by now it’s pumping at a normal fetal rate of 110 to 160 beats per minute. That’s roughly twice as fast as your own resting heart rate. A handheld Doppler ultrasound device can sometimes pick up the heartbeat at prenatal visits around this time, though it’s not always detectable this early depending on the baby’s position and your body type. If your provider can’t find it with a Doppler at 11 weeks, that’s normal and not a cause for concern.
What’s Happening in Your Body
Your uterus has grown from roughly the size of a pear to closer to a grapefruit, and it’s starting to rise out of the pelvic cavity. Some people notice their lower abdomen feeling firmer, though a visible bump at 11 weeks varies widely. First-time pregnancies tend to show later than subsequent ones because the abdominal muscles haven’t been stretched before.
Total weight gain through the entire first trimester is typically 1 to 4.4 pounds, regardless of your starting weight. Some people gain nothing or even lose a pound or two if nausea has been significant. That’s all within the expected range. The larger weight gains happen in the second and third trimesters when the baby, placenta, and fluid volume increase substantially.
Common Symptoms at 11 Weeks
Nausea and fatigue are still the dominant symptoms for many people at this stage, but there’s good news: for most, these start to ease over the next two to three weeks as the placenta takes over hormone production. If your nausea is already fading, that’s also perfectly normal and doesn’t signal a problem.
Other things you might notice:
- Bloating and gas. Progesterone slows digestion, which means food sits in the intestines longer and produces more gas. Smaller, more frequent meals help.
- Breast tenderness. Your breasts may have grown noticeably by now. A well-fitting supportive bra (even for sleeping) can make a difference.
- Increased urination. Your blood volume is rising and your uterus is pressing on your bladder. This eases temporarily in the second trimester as the uterus lifts higher.
- Mood swings. Hormonal shifts combined with fatigue can make emotions feel more intense than usual.
- Skin changes. Some people develop a darker line down the abdomen or notice changes in skin pigmentation. Breakouts are also common due to increased oil production.
Screening Tests Around This Time
Week 11 opens the window for the nuchal translucency scan, an optional ultrasound performed between 11 and 13 weeks. This scan measures a small pocket of fluid at the back of the baby’s neck. A larger-than-typical measurement can indicate a higher risk of chromosomal conditions like Down syndrome, Edwards syndrome, or Patau syndrome, as well as certain heart conditions.
The scan is a screening tool, not a diagnosis. It estimates risk rather than giving a definitive answer. If the result comes back elevated, your provider will discuss follow-up options like cell-free DNA blood testing or diagnostic procedures that can confirm or rule out a condition. Many people with elevated screenings go on to have babies with no chromosomal differences. The scan is quick, painless, and done the same way as a regular ultrasound.
If you’re offered combined first-trimester screening, it pairs the nuchal translucency measurement with a blood draw that checks two hormone levels. Together, these give a more accurate risk estimate than either test alone.