At 14 weeks pregnant, your uterus is roughly the size of a grapefruit, measuring about 10 to 12 centimeters (4 to 5 inches) from top to bottom. It has risen just above your pubic bone and is starting to become noticeable as a small, firm bump in your lower abdomen. This marks the beginning of the second trimester, when uterine growth starts to pick up speed.
Where Your Uterus Sits at 14 Weeks
Before pregnancy, the uterus is about the size of a small pear and sits entirely within the pelvis. By 12 weeks, the top of the uterus (called the fundus) reaches roughly the level of your pubic bone. At 14 weeks, it has crept just above that landmark, which is why many women notice their lower belly starting to round out around this time.
This shift matters because the uterus is transitioning from a pelvic organ to an abdominal one. That’s why some of the classic first-trimester discomforts, like frequent urination from the uterus pressing on your bladder, often ease up around now. As the uterus tilts upward and forward, the pressure moves off your bladder and onto structures higher in your abdomen.
How Big the Baby Is Inside
At 14 weeks, the fetus measures about 81 to 84 millimeters from crown to rump, or just over 3 inches. That’s roughly the length of a lemon. The baby weighs around 1.5 ounces at this stage. While the fetus itself is still quite small, it’s surrounded by amniotic fluid, membranes, and the placenta, all of which contribute to the overall expansion of the uterus.
The amniotic fluid volume is increasing steadily during this period, and the placenta is growing rapidly to support the baby’s accelerating development. Together, these structures account for a significant portion of the uterine size you can feel from the outside.
Why You Might Not “Look” 14 Weeks
Uterine size at 14 weeks varies noticeably from person to person. Several factors influence how much of a bump is visible. If this is your first pregnancy, your abdominal muscles are typically tighter, which can keep the bump less visible for longer. Women in their second or subsequent pregnancies often show earlier because those muscles have already stretched once before.
Your height, torso length, and the position of your uterus also play a role. A taller person with a longer torso has more room for the uterus to expand upward before it pushes outward. The position of the placenta matters too. An anterior placenta (one that attaches to the front wall of the uterus) can add a bit of extra fullness to the belly earlier on. Body composition before pregnancy is another variable. None of these differences indicate anything about the health of the pregnancy.
How Uterine Size Is Measured
Healthcare providers don’t typically start measuring fundal height (the distance from your pubic bone to the top of the uterus with a tape measure) until around 20 weeks. Before that point, the fundus isn’t high enough above the pubic bone to give a reliable tape measurement. After 20 weeks, the fundal height in centimeters roughly matches the number of weeks pregnant you are, making it a quick screening tool at prenatal visits.
At 14 weeks, your provider is more likely to assess uterine size by palpation, simply pressing on your abdomen to feel where the top of the uterus sits. Ultrasound is the most precise way to measure fetal growth and uterine dimensions at this stage, and many women have a dating scan around 12 to 14 weeks that confirms the baby’s size and gestational age.
What Changes to Expect Soon
Growth accelerates through the second trimester. Your uterus will reach your belly button by about 20 weeks and continue rising roughly one centimeter per week after that. The uterine wall itself stretches and thins as it expands, with the muscular layer gradually getting thinner throughout pregnancy to accommodate the growing baby and fluid.
Between 14 and 16 weeks, many women notice their regular pants getting tight even if a visible bump hasn’t fully appeared. You may also start to feel round ligament pain, a sharp or pulling sensation on one or both sides of your lower abdomen, as the ligaments supporting the uterus stretch to keep pace with its growth. This is normal and tends to come and go, especially with sudden movements like standing up quickly or rolling over in bed.
By the end of the second trimester, at about 28 weeks, the uterus will have grown to roughly the size of a basketball and will sit well above your belly button. Looking back, the grapefruit-sized uterus of 14 weeks will feel like a distant memory.