Baby Development Milestones by Week

During the second trimester, a baby grows rapidly, starting from the size of a lemon and reaching the size of an English cucumber. The baby learns to swallow, flex limbs, and move around. Sensory development includes the ability to hear sounds and recognize familiar voices. Physical changes involve the hardening of bones, formation of airways, and growth of hair. By the end of the trimester, the baby has developed muscle tone and is preparing for birth.

During which week does the baby start learning to swallow?

• Week 13

• Week 19

• Week 15

• Week 17

By week 15, the baby is approximately the size of which vegetable?

• Large russet potato

• Bell pepper

• Lemon

• Asparagus spear

What new ability does the baby develop by week 16?

• Sucking thumb

• Making a fist

• Flexing arms and legs

• Hearing sounds

By week 18, which facial features become more defined?

• Eyebrows and eyelashes

• Cheeks and forehead

• Nose and chin

• Eyelids, ears, and upper lip

At what week does the baby start to hear sounds?

• Week 20

• Week 19

• Week 18

• Week 16

What significant development occurs in the baby's lungs by week 19?

• Lungs fully develop

• Lungs expand

• Breathing begins

• Airways start to form

By week 22, what is a notable feature of the baby's appearance?

• Defined jawline

• Visible eyelashes

• Defined cheekbones

• Visible eyebrows

What is the baby's size by week 24?

• Size of a bell pepper

• Size of a lemon

• Size of a pineapple

• Size of an eggplant

By week 25, what can the baby recognize?

• Music

• Familiar sounds

• Father's voice

• Mother's voice

What is the baby's length by the end of the second trimester?

• Over 16 inches

• Over 14 inches

• Over 18 inches

• Over 12 inches