8 Weeks Pregnant

At a Glance: Week 8

• Trimester: First trimester
• Baby size: About the size of a raspberry — roughly 16 mm (0.6 inches) and about 1 gram
• Key milestone: Webbed fingers and toes are emerging, eyelids are forming, and the embryonic tail is disappearing. This is the last week your baby is officially called an embryo; starting next week, the term is fetus. The heart is beating around 150–170 beats per minute.

Your Baby's Development This Week

Week 8 is one of the most visually dramatic weeks of embryonic development. The basic structure of every major organ system has now formed, and the body is starting to look unmistakably human. Webbed fingers and toes are appearing on paddle-shaped hands and feet, and over the next two weeks they will separate as the webbing dissolves.

The face continues to refine. Eyelids are forming and will fuse together to protect the developing eyes until about week 26. The tip of the nose is beginning to appear, and the upper lip is taking shape. Tiny ear structures are visible both inside and outside the head. The neck is forming, separating the head from the chest.

Inside the body, the heart now has four chambers and beats around 150–170 beats per minute — about twice as fast as yours. The intestines are growing so quickly that they temporarily protrude into the umbilical cord; they'll return to the abdomen by around week 11. The kidneys have started to produce urine. The reproductive system is forming, although external genitalia that distinguish male and female are still weeks away from being visible on ultrasound.

Brain development is rapid: roughly 100 new brain cells form every minute during this period. The neural tube has fully closed, and the spinal cord is elongating. The embryo can already make spontaneous movements, though they're far too small to feel.

Your Body and Symptoms This Week

Your uterus has grown to about the size of a tennis ball, though you likely don't look pregnant yet. Inside, your blood volume continues to expand to support the placenta. hCG is nearing its peak, which is why many symptoms feel strongest right around now.

Common week 8 symptoms include:

• Peak nausea and vomiting: For many people, symptoms feel worst between weeks 8 and 11.
• Heightened sense of smell: Familiar smells (coffee, cooking, perfume, garbage) may suddenly trigger nausea.
• Visible vein changes: Blue veins may be more prominent on the chest and breasts as blood volume rises.
• Bloating and gas: Progesterone slows digestion, increasing fermentation.
• Constipation: Common from the same digestive slowing; fiber, water, and movement help.
• Round-ligament twinges: Mild pulling sensations on either side of the lower abdomen.
• Mood swings: Hormonal shifts plus emotional adjustment.
• Vivid dreams: Increased progesterone and fragmented sleep can intensify dreaming.

Nutrition: What to Eat and Avoid This Week

Continue your prenatal vitamin daily with at least 400–600 mcg of folate — neural tube development is still active. Choline (found in eggs, meat, and soybeans) supports brain development and is often under-consumed in pregnancy. Iodine (in iodized salt, dairy, and seafood) is critical for the baby's thyroid and brain development. Iron needs rise throughout pregnancy.

If nausea makes eating hard, prioritize what you can keep down. Bland carbohydrates (toast, crackers, rice, plain potato), cold foods (which smell less), protein-rich snacks (cheese, nut butters, yogurt), and ginger-based foods or tea can help. Small frequent meals are easier than three large ones.

Foods to avoid: raw or undercooked meat, fish, and eggs; unpasteurized dairy or juice; deli meats unless heated until steaming; high-mercury fish (swordfish, king mackerel, shark, tilefish); raw sprouts; pâté; and all alcohol. Limit caffeine to under 200 mg per day.

Movement & Exercise

Regular moderate exercise (about 150 minutes per week) is safe and beneficial in uncomplicated pregnancies. At 8 weeks, walking, swimming, prenatal yoga, and stationary cycling all work well. Strength training is fine — focus on form rather than maximum loads, and avoid breath-holding (Valsalva maneuver).

Avoid contact sports, high-fall-risk activities, hot yoga, hot tubs and saunas (core overheating is a concern in the first trimester), scuba diving, and high-altitude exercise unless you are acclimatized. If exhaustion is overwhelming, a gentle 10-minute walk often delivers more benefit than skipping movement entirely.

Mental & Emotional Wellbeing

Week 8 can feel emotionally heavy. The reality of pregnancy is settling in, symptoms are demanding, and many people haven't yet shared the news. Anxiety about miscarriage often peaks in the weeks leading up to the first ultrasound or first prenatal visit.

Sleep is frequently disrupted — nausea, frequent urination, and vivid dreams all conspire against rest. Naps where possible, an earlier bedtime, and a pre-sleep wind-down routine help. Talk to someone you trust about how you're feeling; emotional support is a meaningful part of prenatal care. If sadness, hopelessness, or panic persist for more than two weeks, mention it to your provider — perinatal mood disorders are common and treatable.

Common Concerns & When to Call Your Doctor

Call your provider if you experience:

• Heavy bleeding (soaking a pad in an hour) or bleeding with cramping or tissue
• Severe one-sided abdominal pain, shoulder-tip pain, or dizziness (possible ectopic pregnancy — call urgently)
• Inability to keep food or fluids down for 24 hours, weight loss, or signs of dehydration (dark urine, dizziness)
• Fever over 38°C (100.4°F)
• Burning with urination, possible UTI symptoms
• Severe persistent headaches or vision changes

Light spotting after intercourse, mild cramping, and on-and-off nausea are usually normal — but always call when in doubt.

Tests & Appointments This Week

Week 8 is when many people have their first prenatal visit. Expect a thorough health history, blood pressure and weight, urine testing, and a blood panel that includes blood type, Rh factor, complete blood count, and screening for infectious diseases (HIV, hepatitis, syphilis, rubella immunity). Many providers do a dating ultrasound (often transvaginal at this stage) to confirm the heartbeat and pregnancy age. You'll discuss prenatal vitamins, medications, family history, and any genetic screening options.

If you're interested in non-invasive prenatal testing (NIPT), it can be drawn from week 10. The first-trimester combined screen (NT scan plus blood work) is performed between weeks 11 and 14.

Tips for Week 8

• Write down questions before your appointment. Brain fog is real — having a list ensures you don't forget what matters.
• Identify and avoid your nausea triggers. Strong smells, certain foods, and even toothpaste flavors can become triggers. Track patterns for a few days.
• Try Sea-Bands or acupressure wristbands. Evidence is mixed but they're safe and help some people.
• Increase fiber and water to head off constipation before it becomes uncomfortable.
• Plan some restorative rest. The first-trimester exhaustion is biological, not weakness — protect downtime where you can.

Preparing for What's Next

In the coming weeks you'll move into the fetal stage of pregnancy (week 9), likely have your first prenatal visit if you haven't yet, and approach the window for the NT scan and NIPT. Begin thinking about your prenatal screening preferences and choice of provider (OB, midwife, family medicine). If you plan to work through pregnancy, look into your workplace policies for prenatal appointments and parental leave.

Frequently Asked Questions