At 11 weeks pregnant, your baby measures about 4.2 to 4.5 centimeters (roughly 1.5 to 1.75 inches) from the top of the head to the bottom, a measurement called crown-rump length. That’s about the size of a fresh fig. Your baby weighs only a few grams at this point, not yet heavy enough to register in ounces on most scales.
How the Baby Is Measured at 11 Weeks
During the first trimester, doctors measure your baby from the crown of the head to the rump (bottom) rather than head to toe. This is because the legs are still curled up tightly against the body, making a full-length measurement unreliable. At exactly 11 weeks and 0 days, the crown-rump length is typically around 42 to 43 millimeters. By 11 weeks and 2 days, it reaches about 45 millimeters. These numbers come from standardized ultrasound charts and are one of the most accurate ways to confirm your due date during the first trimester.
If you have an ultrasound around this time, you’ll see the measurement marked on screen as “CRL.” Small differences of a few millimeters are completely normal and don’t indicate a problem. Babies grow at slightly different rates even this early.
What Your Baby Looks Like Now
At 11 weeks, the baby is starting to look distinctly human. The head is still large relative to the body, making up roughly half the total length, but the body is catching up quickly. The fingers and toes are separating from each other after being webbed in earlier weeks. Tiny fingernails are forming, and small ears are taking shape on the sides of the head.
Reproductive organs are developing internally, but the external genitalia still look similar regardless of sex. It’s too early for an ultrasound to reliably tell you whether you’re having a boy or girl. That typically becomes possible between 18 and 22 weeks.
Your baby is already moving around, kicking and stretching inside the amniotic sac. These movements are real but far too small for you to feel. Most people don’t notice any flutters for at least another month or two.
How 11 Weeks Compares to Other Weeks
Growth during the first trimester is rapid. To put week 11 in perspective: at 8 weeks, your baby was only about 1.5 centimeters long, roughly the size of a raspberry. By 11 weeks, that length has nearly tripled. Over the next few weeks, growth will accelerate even further. By week 14, the baby will be close to 8 or 9 centimeters long, and weight gain will become more noticeable as the organs mature and the body fills out.
Week 11 sits near the end of the first trimester, a period focused primarily on forming organs and structures. The second trimester shifts toward growth in size and weight, which is when those weekly measurements start changing more dramatically.
Your Body at 11 Weeks
Even though the baby is still very small, your uterus is expanding to accommodate growth. At 11 weeks, it’s roughly the size of a grapefruit and sits just above your pubic bone. Some people start to notice their waistband getting tighter around this time, though a visible bump varies widely from person to person, especially in a first pregnancy.
You likely won’t gain much weight specifically from the baby at this stage. Most early pregnancy weight gain comes from increased blood volume, the growing uterus, and fluid retention rather than the baby itself. The baby’s weight gain becomes a meaningful contributor in the second and third trimesters.