10 Weeks Pregnant: End of the Embryonic Period

At 10 weeks pregnant, your baby has officially graduated from embryo to fetus—a milestone that marks the completion of the most critical phase of organ development. All of your baby’s vital organs are now formed and functioning, and the remaining months of pregnancy will focus on growth and maturation. Meanwhile, you may be starting to feel the first hints of the second trimester energy boost that many women experience. The worst of morning sickness is often beginning to ease, and you’re approaching the point where many couples choose to share their pregnancy news more widely.

Baby Development at 10 Weeks

Your baby is about the size of a strawberry—approximately 1.2 inches (31 mm) from crown to rump and weighing about 0.14 ounces (4 grams). Your baby has doubled in size over the past three weeks, and growth will continue to accelerate from here.

This week marks the end of the embryonic period and the beginning of the fetal period. All major organs are now formed and functioning at a basic level. The kidneys are producing urine. The liver is producing bile. The stomach is producing digestive juices. The brain is growing rapidly and producing about 250,000 new neurons per minute—an astounding rate that will continue throughout pregnancy.

Your baby’s appearance is becoming more recognizably human. The forehead temporarily bulges with the growing brain. The eyes are fully formed but sealed shut—they won’t open until around week 26. The ears are nearly in their final position on the head. Tooth buds are forming beneath the gums. Tiny fingernails and toenails are appearing.

Your baby is moving actively—kicking, stretching, yawning, and even swallowing amniotic fluid. These movements help develop muscles and joints. Bones are beginning to harden (ossify) from cartilage, a process that will continue throughout pregnancy and into childhood. The spine is visible and spinal nerves are stretching outward.

Your Body This Week

At 10 weeks, your uterus is about the size of a grapefruit and is beginning to rise above the pubic bone. You may notice a small bump forming, particularly in the lower abdomen. Your waistline is likely thickening, and your regular pants may be getting uncomfortable. Many women begin transitioning to maternity wear or stretchy waistbands around this time.

Blood volume has increased significantly—you now have about 25% more blood than before pregnancy, and this will continue increasing to about 50% more by delivery. This increased blood volume can cause visible veins on your chest, abdomen, and legs. Some women develop spider veins or varicose veins.

hCG levels are beginning to plateau, which means that morning sickness may start to improve over the next 2-4 weeks. Not all women experience relief at the same time, but the trend is generally toward feeling better as you approach the second trimester.

Emotionally, many women at 10 weeks are beginning to feel more settled into pregnancy. The initial shock or excitement has given way to a more steady awareness. Some women begin to feel more bonded with their baby, especially after hearing the heartbeat or seeing the baby on ultrasound.

Common Symptoms at 10 Weeks

Morning Sickness May Be Easing: For some women, nausea begins to decrease around 10 weeks as hCG levels plateau. However, others may not see improvement until 12-14 weeks. Continue with whatever management strategies work for you.

Growing Belly and Clothes Getting Tight: While you may not be visibly pregnant to others, you’re likely noticing changes in how your clothes fit. Bloating and uterine growth are combining to make your midsection thicker. Consider investing in a belly band or maternity pants for comfort.

Visible Veins: Increased blood volume makes veins more visible, particularly on your chest and abdomen. Some women also develop spider veins on their face or legs. These typically fade after delivery.

Round Ligament Pain: As your uterus grows, the round ligaments that support it stretch, causing sharp or aching pain in the lower abdomen or groin area. This is more common on the right side and can be triggered by sudden movements, sneezing, or coughing. It’s uncomfortable but harmless.

Mood Improvements: As hormones begin to stabilize, some women notice their mood evening out. The intense emotional swings of early pregnancy may start to diminish, though hormonal mood effects continue throughout pregnancy.

Increased Energy (for Some): A few women begin experiencing the energy boost of the second trimester as early as 10 weeks. Others won’t notice this improvement until 12-14 weeks. If your energy is returning, take advantage of it while maintaining adequate rest.

What to Do This Week

Consider NIPT Testing: Non-invasive prenatal testing (NIPT) can be done starting at 10 weeks. This blood test screens for chromosomal conditions including Down syndrome (trisomy 21), trisomy 18, and trisomy 13, with detection rates over 99%. Discuss with your provider whether this test is right for you.

Plan for First-Trimester Screening: If you’re opting for traditional first-trimester screening (NT ultrasound plus blood work), this is typically done between 11-14 weeks. Schedule the appointment if you haven’t already.

Consider When to Share Your News: Many couples wait until after the first trimester (12-13 weeks) to announce their pregnancy more widely, as the risk of miscarriage drops significantly by that point. Start thinking about how and when you’d like to share your news. There’s no right or wrong time—do what feels comfortable for you.

Begin Researching Childbirth Education: While delivery is still months away, popular childbirth education classes can fill up quickly. Start researching what’s available in your area—hospital-based classes, Bradley Method, Lamaze, HypnoBirthing, or online options. Begin thinking about your birth preferences.

Stay on Top of Dental Care: Pregnancy hormones increase your risk of gum disease. If you haven’t had a dental checkup recently, schedule one. Good oral health during pregnancy is important for both you and your baby.

Nutrition Spotlight: Fiber and Digestive Health

Constipation is one of the most common pregnancy complaints, driven by progesterone slowing your digestive system and iron supplements. Aim for 25-30 grams of fiber daily from fruits, vegetables, whole grains, beans, and legumes. High-fiber foods include raspberries, pears, broccoli, oats, lentils, and chia seeds.

Drink at least 8-10 glasses of water daily—fiber works best when combined with adequate hydration. Regular physical activity also helps keep your digestive system moving. If constipation is severe despite dietary changes, ask your provider about pregnancy-safe stool softeners like docusate sodium (Colace).

When to Call Your Doctor

Contact your healthcare provider if you experience:

Heavy vaginal bleeding or passing clots or tissue.

Severe abdominal or pelvic pain.

Persistent vomiting preventing any food or fluid intake.

Fever above 100.4°F (38°C).

Painful urination or blood in urine.

Severe headache or vision changes.

FAQ: 10 Weeks Pregnant

Q: What is the risk of miscarriage at 10 weeks?

A: By 10 weeks, the risk of miscarriage has dropped significantly—to about 2-3% if a heartbeat has been confirmed on ultrasound. The majority of miscarriages occur before 10 weeks. After seeing a heartbeat at 8-10 weeks, the likelihood of carrying to term is over 95%. This is reassuring news as you approach the second trimester.

Q: When can I find out my baby’s sex?

A: NIPT (available from 10 weeks) can reveal your baby’s sex through a blood test with over 99% accuracy. The anatomy scan ultrasound (typically at 18-20 weeks) can also determine sex visually. Some parents choose to find out early, others wait for the anatomy scan, and some prefer to be surprised at delivery.

Q: Should I worry about weight gain in the first trimester?

A: Most women gain 2-5 pounds during the first trimester, though some lose weight due to morning sickness. Both scenarios are normal. Your provider will monitor your weight at each appointment and discuss healthy weight gain goals based on your pre-pregnancy BMI. Review our pregnancy weight gain guide for detailed information.