At 11 weeks pregnant, your baby is about the size of a lime, measuring roughly 1.6 inches from head to rump and weighing around a quarter of an ounce. That’s small enough to fit on a tablespoon, but the level of detail already forming is remarkable. Tiny fingers and toes are separating, facial features are taking shape, and the skeleton is beginning to harden from soft cartilage into actual bone.
Overall Size and Proportions
The crown-rump length at 11 weeks averages about 4.1 centimeters (1.61 inches), and the weight is approximately 7 grams. The head still makes up roughly half the total body length, giving your baby a top-heavy appearance that will gradually even out over the coming months. The body is starting to straighten from its earlier curled, C-shaped posture, and the torso is lengthening to accommodate the organs growing inside.
Facial Features Taking Shape
By 11 weeks, the face looks distinctly human, though still very small and delicate. The eyes have moved from the sides of the head toward the front, though the eyelids are fused shut and will stay that way for several more weeks. The ears are nearly in their final position on the sides of the head, sitting low at this stage. Tiny tooth buds are forming inside the gums, and the nasal passages are open. The lips and nose are clearly defined as separate structures.
Hands, Feet, and Limbs
The fingers and toes, which were webbed just a few weeks ago, are now fully separated. Nail beds are beginning to develop, and the hands can open and close into small fists. The arms and legs are still short relative to the body, but they’re growing quickly. Your baby is already moving those limbs, stretching, kicking, and even hiccupping, though at this size you won’t feel any of it. Most women don’t notice fetal movement until well after 14 weeks, and first-time mothers often don’t feel it until 18 to 22 weeks.
Bones Beginning to Harden
One of the most significant developments happening at 11 weeks is ossification, the process of cartilage transforming into bone. The spine is a major site of this activity right now. Ossification of the vertebrae begins around weeks 10 and 11, and by the end of week 11, hardening centers are present throughout the cervical, thoracic, lumbar, and sacral spine. This doesn’t mean the skeleton is rigid. Most of the body is still soft cartilage, and it will take months for the bones to fully mineralize. But the framework is being laid down in a rapid, organized sequence starting from the upper spine and working downward.
Organs and Internal Development
Inside that tiny body, the organs are forming at a rapid pace. The liver is already producing red blood cells, taking over a job that was handled by other structures earlier in development. By the end of the first trimester (just one week from now), all major organs, limbs, bones, and muscles will be present. The circulatory system, digestive tract, and urinary system are all beginning to function. The intestines, which temporarily grew into the umbilical cord because the abdomen was too small to hold them, are starting to migrate back into the body cavity, though they won’t reach their final position for a few more weeks.
The diaphragm is forming, and the kidneys are beginning to produce urine. Your baby will soon be swallowing and passing small amounts of amniotic fluid, a process that helps the digestive system practice for life outside the womb.
Can You Tell the Sex Yet?
At 11 weeks, the structural beginnings of external genitalia are present but not yet distinct enough for a reliable visual identification. Both male and female fetuses have a small bump called the genital tubercle. In males, this tubercle begins to angle upward; in females, it stays more horizontal. But the difference is subtle at this stage. Research from the Fetal Medicine Foundation found that ultrasound-based sex determination at 11 weeks was accurate only about 70% of the time. Male fetuses were incorrectly identified as female in 56% of cases at 11 weeks. By 12 weeks, accuracy jumped to nearly 99%, and by 13 weeks it reached 100%.
If you’re hoping to learn your baby’s sex, a blood-based screening test can detect it as early as 10 weeks with high accuracy. Ultrasound, however, is most reliable for sex determination after 12 weeks.
What You’d See on an Ultrasound
If you have an ultrasound around 11 weeks, you’ll see a small but clearly baby-shaped figure. The head is round and prominent, the body is visible with arm and leg buds that may be moving during the scan. You can often see the heartbeat flickering on screen, beating at roughly 120 to 160 times per minute. The profile may show a recognizable forehead, nose, and chin. It won’t look like a newborn yet, but it’s unmistakably a developing baby, a far cry from the tiny bean shape visible at 6 or 7 weeks.
Some parents are surprised by how active the baby appears during an 11-week scan. Stretching, wriggling, and even somersaulting are all common at this stage, even though you can’t feel any of it from the outside.