8 Weeks Pregnant: From Embryo to Fetus

At 8 weeks pregnant, your baby is now about the size of a raspberry and is transitioning from embryo to fetus. All of your baby’s essential organs have begun forming, and tiny fingers and toes are starting to appear. This is often the week of your first prenatal visit—a milestone that makes the pregnancy feel more real for many women. Morning sickness may be reaching its peak, but understanding that this is typically the most challenging phase for nausea can provide hope that relief is coming soon.

Baby Development at 8 Weeks

Your baby is about the size of a raspberry—approximately 0.6 inches (16 mm) from crown to rump and weighing less than an ounce. Despite the tiny size, an incredible amount of development has occurred. Your baby’s body is becoming more defined, with a recognizable head, body, and limb structure.

Fingers and toes are beginning to form, though they’re still webbed at this stage. Your baby’s arms can bend at the elbow. The ears are forming both externally and internally, with inner ear structures developing that will eventually control balance. The upper lip, nose, and eyelids are becoming more defined.

Internally, your baby’s intestines are growing so rapidly that they temporarily extend into the umbilical cord—they’ll move back into the abdominal cavity around weeks 10-11. The heart has divided into four chambers and is pumping blood efficiently. The brain continues its remarkable growth, with nerve pathways connecting throughout the body.

By the end of week 8, your baby will officially transition from an embryo to a fetus. This naming change reflects a developmental milestone—all major organ systems are now present and will continue to mature throughout the remaining pregnancy. Your baby is beginning to make tiny movements, though you won’t feel these for several more weeks.

Your Body This Week

At 8 weeks, your uterus has grown to about the size of a large orange. You probably still don’t look pregnant, though your clothes may feel tighter around the waist due to bloating and early uterine expansion. Blood volume continues to increase—your heart is now pumping about 50% more blood per minute than before pregnancy.

hCG levels are approaching their peak, which typically occurs between 8-11 weeks. This means morning sickness and other hormone-driven symptoms may be at their most intense right now. The good news: once hCG levels plateau and begin to decline (around 11-12 weeks), most women experience significant symptom relief.

Your breasts have likely grown noticeably. You may need to move up a bra size. Blue veins may be more visible across your chest as blood flow increases. These changes are all preparation for eventual milk production, even though breastfeeding is months away.

Common Symptoms at 8 Weeks

Peak Morning Sickness: Nausea and vomiting may be at their worst around 8-10 weeks. Some women experience nausea all day long. Continue with small, frequent meals and whatever remedies work for you. Vitamin B6 (25mg three times daily) and doxylamine (Unisom) are considered safe—ask your provider.

Heightened Sense of Smell: Many women report that their sense of smell becomes almost supernaturally strong during the first trimester. Scents that never bothered you before may now trigger nausea. This is thought to be an evolutionary protective mechanism to help you avoid potentially harmful substances.

Increased Vaginal Discharge: A thin, milky white discharge (leukorrhea) is normal during pregnancy and is caused by increased estrogen and blood flow to the vaginal area. The discharge should be mild-smelling or odorless. If it’s yellow, green, has a strong odor, or is accompanied by itching, contact your provider.

Vivid Dreams: Many pregnant women report unusually vivid or strange dreams. This is likely caused by hormonal changes and interrupted sleep patterns. These dreams are normal and don’t carry any medical significance.

Mild Headaches: Hormonal changes and increased blood volume can cause headaches during early pregnancy. Ensure you’re staying hydrated, eating regularly, and getting adequate rest. Acetaminophen (Tylenol) is generally considered safe during pregnancy, but avoid ibuprofen and aspirin unless directed by your provider.

Cramping: Mild uterine cramping continues as your uterus grows. This is normal as long as cramping is mild and not accompanied by heavy bleeding.

What to Do This Week

Attend Your First Prenatal Visit: This comprehensive appointment typically includes confirmation of pregnancy, dating ultrasound, blood work (blood type, Rh factor, CBC, glucose, hepatitis B, HIV, rubella immunity, STI screening), urine tests, blood pressure measurement, and a thorough health history review. Come with your questions and medical records.

See Your Baby’s Heartbeat: If you haven’t already had an ultrasound, this first appointment often includes one. Seeing your baby’s heartbeat is an emotional and reassuring experience. Your provider will measure the embryo to confirm your due date and check that development is on track.

Discuss Prenatal Testing Options: Your provider will discuss available screening tests. First-trimester screening (NT scan plus blood work) is typically done at 11-14 weeks. NIPT (non-invasive prenatal testing) can be done as early as 10 weeks. Understanding your options now gives you time to make informed decisions.

Review Your Dental Health: Pregnancy hormones can affect your gums, making them more susceptible to gingivitis. Schedule a dental checkup and cleaning. Let your dentist know you’re pregnant. Dental x-rays should be avoided during the first trimester when possible.

Plan for Work Accommodations: If morning sickness or fatigue is affecting your work performance, consider what accommodations might help. You don’t need to disclose your pregnancy yet if you’re not ready, but you may want to think about how your workload might change in the coming months.

Nutrition Spotlight: Calcium and Vitamin D

Calcium and vitamin D are essential for your baby’s bone and tooth development. Aim for 1,000 mg of calcium daily from dietary sources (dairy products, fortified plant milks, leafy greens, sardines) and your prenatal vitamin. Vitamin D (600 IU daily) helps your body absorb calcium and supports immune function.

If dairy triggers your morning sickness, try calcium-fortified orange juice, almond milk, or calcium supplements. Your baby’s skeleton will begin to calcify in the coming weeks, making adequate calcium intake increasingly important.

When to Call Your Doctor

Contact your healthcare provider if you experience:

Heavy vaginal bleeding or passage of tissue.

Severe abdominal or pelvic pain.

Inability to keep any food or liquids down for 24+ hours.

Fever above 100.4°F (38°C).

Painful urination or blood in urine.

Severe dizziness or fainting episodes.

FAQ: 8 Weeks Pregnant

Q: What happens at the first prenatal appointment?

A: Your first prenatal visit is comprehensive. It includes confirming your pregnancy, estimating your due date (often with an ultrasound), taking a complete medical and family history, running blood tests and urine tests, checking your blood pressure and weight, and discussing prenatal testing options. Come prepared with a list of questions and your medical history.

Q: When does morning sickness get better?

A: For most women, morning sickness peaks around 8-10 weeks and begins improving by 12-14 weeks as hCG levels plateau. By 16 weeks, most women feel significantly better. However, some women experience nausea throughout their entire pregnancy. If your nausea is severe, talk to your provider about safe treatments.

Q: Is it normal to not feel pregnant at 8 weeks?

A: Yes, some women have very mild symptoms throughout the first trimester. Symptom intensity varies widely between women and between pregnancies. Not feeling pregnant doesn’t indicate a problem. If you’re concerned, your provider can reassure you with a heartbeat check at your next visit.