you're 15 weeks pregnant.
last revised · baby is about 10.1 cm (4.0") · 70 g (2.5 oz)
At 15 weeks pregnant, your baby is about 10.1 cm and 70 g — The baby can hear muffled sounds now — your voice, heartbeat, and digestion.
about the size of a…
The baby can hear muffled sounds now — your voice, heartbeat, and digestion. Bones are getting harder.
this week's highlights
- Hearing develops
- Bones harden
- Taste buds form
- Practice breathing motions
how your baby looks
Limbs are well-proportioned. Skin is still see-through but a thin layer of fat will start building soon. Eyes are still closed.
body in focus
- head
- Tiny taste buds form on the tongue.
- body
- Practice breathing motions begin — pulling amniotic fluid in and out.
- hands
- Hands can grasp and clench.
- feet
- Strong reflex kicks against the uterine wall.
what's happening in your body
You may have more energy and clearer skin. Some people start feeling early flutters (called quickening) — like bubbles or popcorn popping.
symptoms at 15 weeks
- Possible first flutters
- Some people — usually those in second or later pregnancies — feel the first bubbles or flickers of movement around now. If you feel nothing, that is entirely on schedule too.
- Nasal congestion and nosebleeds
- Rhinitis of pregnancy persists for many through mid-pregnancy. It is a nuisance rather than a worry, and clears after birth.
- Heartburn beginning
- Progesterone relaxes the valve at the top of the stomach, letting acid creep upward. Smaller meals, not lying down after eating, and antacids approved by your pharmacist all help.
- Forgetfulness
- So-called baby brain is widely reported in mid-pregnancy — likely a mix of hormones, disturbed sleep and simply having more to think about. Lists and phone reminders are your friends.
- Dental sensitivity
- Gums remain puffy and teeth can feel more sensitive. Keep up gentle, thorough dental care and attend that check-up.
- Feeling the uterus
- You may now feel the top of your uterus (fundus) as a firm curve about halfway between your pubic bone and belly button. Feeling it for the first time makes the pregnancy suddenly tangible for many people.
gentle tips
- Talk and sing to your bump — your baby can hear your voice.
- Add iron-rich foods to fight anemia (lean meat, beans, spinach).
- Sleep on the left side with a pillow between the knees.
- Confirm the anatomy scan appointment for weeks 18–22.
- Find a comfortable pair of supportive shoes.
your week 15 checklist
- Discuss the mid-pregnancy blood tests your provider offers around 15 to 20 weeks (including quadruple screening if relevant)
- Confirm the anomaly scan is booked for the 18-to-22-week window
- Buy one or two properly fitting maternity items rather than sizing up in regular clothes
- Start a short daily wind-down routine — sleep gets harder from here, and habits help
what to expect next
Quickening — those first tiny flutters — usually start between weeks 16–22. First-time mums often feel them later than second-time mums.
common questions at week 15
How big is the baby at 15 weeks?
At 15 weeks, the baby measures about 10.1 cm and weighs approximately 70 g (10.1 cm (4.0") · 70 g (2.5 oz)).
What is developing at 15 weeks?
Limbs are well-proportioned. Tiny taste buds form on the tongue. Key milestones this week include: Hearing develops; Bones harden; Taste buds form; Practice breathing motions.
What symptoms are common at 15 weeks pregnant?
You may have more energy and clearer skin. Some people start feeling early flutters (called quickening) — like bubbles or popcorn popping.
What should I do at 15 weeks pregnant?
Quickening — those first tiny flutters — usually start between weeks 16–22. Talk and sing to your bump — your baby can hear your voice. Add iron-rich foods to fight anemia (lean meat, beans, spinach). Sleep on the left side with a pillow between the knees.
What does quickening feel like at first?
Most people describe the first movements as bubbles popping, a fish flickering, butterflies, or a faint muscle twitch — so subtle that first-timers usually dismiss them as digestion. They are typically felt low in the belly and come and go unpredictably at first. Distinct, unmistakable kicks usually follow two to four weeks after the first flutters.
Can the baby hear me at 15 weeks?
Hearing structures are developing fast, and from around 16 to 18 weeks the baby begins responding to sounds — first your heartbeat and digestion, then muffled voices from outside. Your own voice is the clearest sound in the womb because it also travels through your body. There is no need for special speakers; ordinary talking and singing are exactly the right input.
Why am I getting heartburn when I never used to?
Pregnancy hormones relax the ring of muscle between your oesophagus and stomach, letting acid reflux upward — and later, the growing uterus pressing on the stomach adds to it. Eating smaller meals, avoiding late-night food, limiting spicy and fatty triggers, and sleeping slightly propped up all reduce it. If it is severe or persistent, your midwife, doctor or pharmacist can recommend pregnancy-safe antacids.
helpful tools
- Belly Timeline
Document your bump week by week with photos.
- Kick Counter
Track fetal movement — kicks usually begin around week 18–22.
- Milestones
Week-by-week milestones tied to your due date.
Medically aligned with guidance from WHO, NHS and ACOG. How we write.