§second trimester · week 17 of 40
you're 17 weeks pregnant.
last revised · baby is about 13 cm (5.1") · 140 g (4.9 oz)
about the size of a pear.
A waxy coating called vernix starts to protect the skin. Sweat glands form, and the umbilical cord grows thicker and stronger.
this week's highlights
- Vernix coats the skin
- Sweat glands develop
- Umbilical cord thickens
- Hearing sharpens
how your baby looks
Skin is still see-through but now covered with a creamy waxy coat (vernix caseosa) that protects it from amniotic fluid.
body in focus
- head
- Hearing is sharp enough to recognize your voice.
- body
- Vernix and sweat glands form.
- hands
- Fine fingernails are growing toward fingertips.
- feet
- Strong rhythmic kicks may start being noticed.
what's happening in your body
Your bump is more visible. You may notice back discomfort starting up — posture matters as the belly grows.
gentle tips
- Practice good posture; stand tall and keep shoulders back.
- Wear low-heeled, supportive shoes.
- Plan or take a prenatal class if you haven't.
- Apply moisturizer to belly, hips, and breasts to soothe stretching skin.
- Limit time on your feet — break up long standing with sit-downs.
what to expect next
The anatomy scan in 1–5 weeks will check on heart, brain, kidneys, and limbs in detail. You can also learn the sex if curious.