Week 15 of Pregnancy
You’re now in the second trimester and may be feeling more energetic. Many expectant parents begin to notice a small baby bump, and baby is growing rapidly with some exciting new milestones.
Baby’s Size
Your baby is about the size of an apple.
Baby’s Development at 15 weeks
Breathing practice begins
Baby is practicing breathing movements by inhaling amniotic fluid, which helps lung development.
Baby can hear you
The ears are developing and baby may start to hear muffled sounds from the outside world, including your voice.
Fine hair appears
Soft hair called lanugo begins to cover baby’s body to help regulate temperature.
Bones are strengthening
Bones are growing harder, especially in the legs and arms, allowing for more movement.
Pregnancy Symptoms during Week 15
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As your uterus expands, you may feel sharp or aching pain in your lower belly or sides, this is normal.
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You may notice more vaginal discharge, which helps protect against infections, but contact your provider if it changes color or smells unusual.
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Your growing uterus may start to press against your stomach, causing occasional discomfort.
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Fatigue from early pregnancy may ease up, giving you a welcomed boost of energy.
Pregnancy checklist at 15 weeks pregnant
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Now is a great time to book your anatomy scan, typically done between 18 and 22 weeks.
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Make sure you're getting enough iron, calcium, and protein to support baby’s bone and muscle growth.
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Light exercises like walking or prenatal yoga can ease discomfort and boost circulation.
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Explore options like our 7-Week Prenatal Group Series or a Private 1-on-1 Prenatal Class to start preparing for labour early.
15 Weeks Pregnant Belly
By Week 15, your uterus is growing quickly. It's likely rising up and out of your pelvis, which means your lower belly might be starting to show more noticeably, especially if this isn’t your first pregnancy.
You might notice:
A small but defined baby bump forming, especially when standing or wearing tighter clothes.
A firmer feel in the lower abdomen, just above the pubic bone.
Less bloating than in earlier weeks, so your bump may look more like a baby belly than just water retention.
Round ligament pain, which can feel like stretching or tugging on the sides of your belly as your uterus expands.
Even if you're not visibly showing yet, there's a lot happening inside! Every body grows at its own pace, some show early, others much later, and all are normal.
Tips & Resources
Begin preparing for your new arrival by reviewing our Preparing for Your New Arrival Guide, which offers gentle guidance on what to expect and how to plan ahead.
As your belly grows, it’s a good time for your partner to get involved too. The Partner Support Guide shares simple ways they can help now and through delivery.
Want to feel more confident about labour? Enroll in our 7-Week Prenatal Group Series or consider a Private 1-on-1 Prenatal Class for tailored support.
Keep our Hospital Packing List handout handy, it’s never too early to feel prepared.