15 Weeks Pregnant

Your baby this week

Your baby is about the size of an apple, measuring around 4 inches and weighing about 2.5 ounces. Baby is incredibly active right now — rolling, flipping, twisting, and kicking — though most first-time moms won't feel these movements for a few more weeks. The skeletal system continues to harden (ossify) as calcium is deposited into the developing bones. Baby can now sense light through closed eyelids — if you shine a flashlight on your belly, baby might move away from the beam. The three tiny bones of the middle ear are forming, and the auditory system is developing rapidly.

How you may feel

Pregnancy rhinitis — a stuffy, congested nose — is a very common symptom caused by increased blood flow and swelling of the nasal membranes, affecting up to 30% of pregnant women. Round ligament pain may cause sudden sharp or jabbing pains on one or both sides of the lower abdomen, especially when changing positions or coughing. You may notice increased pigmentation — darkening of moles, freckles, nipples, and the linea nigra down your belly. Some women experience nosebleeds more frequently due to increased blood volume and delicate nasal blood vessels. Your uterus is now about the size of a small cantaloupe.

Common symptoms

• Nasal congestion ("pregnancy rhinitis") may persist due to swollen nasal membranes.
• Round ligament pain — sharp twinges in your lower belly when standing or coughing.
• Increased energy and improved mood compared to the first trimester.

This week's tips

If nasal congestion is bothering you, use a humidifier in your bedroom at night and try saline nasal spray — both are safe during pregnancy. Avoid decongestant medications unless approved by your healthcare provider. To minimize round ligament pain, move slowly when changing positions, and try supporting your belly with a pillow when lying on your side. This is a good time to start doing Kegel exercises to strengthen your pelvic floor muscles, which support the uterus, bladder, and bowels during pregnancy and help with recovery after delivery.

Eating well

• Include sweet potatoes and carrots for beta-carotene, which converts to vitamin A.
• Eat Greek yogurt with berries for protein, calcium, and probiotics.
• Try chia seed pudding for omega-3s, fiber, and calcium in one snack.

Nutrition focus

• Ensure 220 mcg iodine daily — crucial for baby's brain and thyroid development.
• B12 (2.6 mcg/day) supports nerve development — important for vegetarian mothers.

Everyday wellbeing

• A quad screen blood test may be offered between weeks 15–20.
• Practice good posture to reduce back strain as your center of gravity shifts.
• Stay active — aim for 150 minutes of moderate exercise per week.

For your partner

She might start feeling the baby's movements soon — ask if you can place your hand on her belly, but be patient as it may take a few more weeks before kicks are strong enough to feel from outside. Start reading about the anatomy scan coming up around weeks 18-20, so you know what to expect and what questions to ask. Help her stay comfortable by offering to adjust pillows, bring warm compresses for round ligament pain, or simply being understanding when she needs to sit down and rest. Consider starting a baby registry together — it's a fun activity that also helps you both think through what you'll actually need.

Signs to mention to your provider

• Severe nosebleeds that don't stop after 20 minutes need medical attention.
• Pain or burning during urination — UTIs are more common and risky during pregnancy.
• Decreased urine output with dark color indicates dehydration — increase fluid intake.

Disclaimer: BabyBerry is for general information and self-tracking. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.

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