13 Weeks Pregnant

Your baby this week

Welcome to the second trimester! Your baby is about the size of a peach, measuring around 2.9 inches and weighing nearly an ounce. Baby now has unique fingerprints, and the vocal cords are developing in preparation for that first cry. The intestines, which had been growing in the umbilical cord, are now moving fully into the abdomen. Tiny bones are forming in the arms and legs, and if you could peek inside, you'd see baby practicing breathing movements by inhaling and exhaling amniotic fluid. The placenta is now fully functional, providing oxygen, nutrients, and waste removal.

How you may feel

Energy is returning as you enter the "golden trimester" — many women report feeling their best during the second trimester. Nausea usually begins to fade, and your appetite may come roaring back. A small baby bump may be starting to show, especially if this isn't your first pregnancy. Your risk of miscarriage has dropped dramatically, which can bring emotional relief and renewed excitement. You may notice changes in your skin, including the "pregnancy glow" caused by increased blood flow and oil production.

Common symptoms

• Welcome to the second trimester — energy levels often increase noticeably.
• Your uterus is now above the pelvic bone; the bump becomes more defined.
• Stretch marks may begin appearing on your breasts or lower abdomen.

This week's tips

This is a wonderful time to start or resume gentle exercise — walking, swimming, and prenatal yoga are all excellent choices that are safe throughout pregnancy. Aim for about 150 minutes of moderate-intensity exercise per week, as recommended by ACOG. Start incorporating calcium-rich foods like yogurt, cheese, and leafy greens, as baby's bones are actively developing. If you've been putting off dental care, schedule a cleaning now — pregnancy hormones can increase your risk of gingivitis and gum disease. Begin shopping for maternity clothes as your regular wardrobe starts to feel snug.

Eating well

• Increase daily calories by about 340 kcal — an extra healthy snack covers this.
• Eat avocados, olive oil, and nuts for healthy fats that support baby's brain.
• Include lentils and chickpeas for plant-based protein and folate.

Nutrition focus

• Iron needs increase — aim for 27 mg/day to support your growing blood volume.
• Continue DHA supplementation (200–300 mg/day) for fetal neurodevelopment.

Everyday wellbeing

• This is a great time to start or resume a regular exercise routine.
• Begin applying a rich moisturizer or cocoa butter to areas prone to stretch marks.
• Consider a dental checkup — pregnancy hormones increase gum disease risk.

For your partner

With her energy returning and nausea fading, now is the perfect time to plan a "babymoon" trip — a relaxing getaway for just the two of you before baby arrives. The second trimester is the ideal window since she'll likely feel her best. Choose a destination that's not too far from medical care, and avoid destinations requiring certain vaccinations that aren't safe during pregnancy. Start discussing your hopes, fears, and expectations about parenthood together — open communication now builds a stronger foundation for the journey ahead.

Signs to mention to your provider

• Watery vaginal discharge in a gush could indicate premature membrane rupture.
• Persistent lower back pain with rhythmic cramping may signal preterm labor.
• Signs of a UTI (burning, urgency, cloudy urine) need prompt antibiotic treatment.

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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