The fetus is getting stronger by the day. Bones are hardening enough to show up on an X-ray, and the inner ear structures are developing, meaning the fetus will soon begin to hear sounds. Some parents feel the first flutters of movement around this time.
Your Baby This Week
Size: Apple (about 10 cm, or 4 inches)
Weight: About 70 grams
- Skeleton: Bones are ossifying (hardening) and becoming visible. The legs are now longer than the arms.
- Hearing: The tiny bones of the inner ear (ossicles) are forming. The fetus cannot hear clearly yet, but will start responding to sounds in the coming weeks.
- Eyes: Still fused shut, but the eyes can sense light. If you shine a bright light at your belly, the fetus may turn away.
- Skin: Still thin and translucent. Blood vessels are clearly visible.
- Taste buds: Developing on the tongue. The fetus swallows amniotic fluid, and research suggests it can detect different flavors based on what you eat.
- Movement: More coordinated. Rolling, stretching, and thumb-sucking are common.
Your Body
- Quickening. Some people, especially those who have been pregnant before, start to feel very faint fluttery movements. First-time parents usually notice them between weeks 18 and 22.
- Weight gain becoming more noticeable. About 0.5 kg (1 pound) per week is typical in the second trimester.
- Pregnancy brain. Forgetfulness and difficulty concentrating are real. Hormonal changes and sleep disruption contribute.
- Gum sensitivity. Pregnancy gingivitis affects up to 75% of pregnant people.
What to Do This Week
- Stay on top of dental care. Brush twice daily, floss, and keep your regular dental appointments. Inform your dentist that you are pregnant.
- Talk and sing to your baby. While hearing is still developing, your voice travels through your body as vibrations that the fetus can sense.
- Discuss the anatomy scan. Your mid-pregnancy ultrasound (structural scan) will typically happen between weeks 18 and 22. Ask your provider when yours is scheduled.
Common Questions
What does quickening feel like?
Early fetal movements are often described as flutters, bubbles, or a light tapping sensation. Many people mistake them for gas at first. The feelings become stronger and more distinct as weeks pass.
Should I be worried about pregnancy brain?
No. Mild forgetfulness during pregnancy is common and well-documented. Some studies suggest it may be related to brain changes that help prepare you for parenting, particularly in areas linked to social cognition and bonding.