11 Weeks Pregnant

Baby’s Development

Your fetus is now about 4.1 centimeters long (the size of a fig) and weighs around 7 grams [1]. The diaphragm begins contracting this week, so your baby is “breathing” amniotic fluid in and out — building the respiratory muscles for life outside the womb. Vocal cords are forming, and taste buds are appearing on the lips, tongue, and palate. Tooth buds are hardening, and bones are beginning to ossify, visible on ultrasound. Your baby’s skin is still transparent, with blood vessels visible beneath. The head makes up about half of the body length, and the fingers and toes are no longer webbed. Genitalia are differentiating internally (ovaries or testes forming), though the external appearance remains ambiguous until around weeks 12 to 14. Movement is becoming more active — stretching, rolling, and hiccupping — and reflexes like the palmar and plantar grasp are now present [2].

Body Changes

Your uterus is about the size of a grapefruit and can be felt above the pubic bone. Your blood volume is up 30 to 50 percent, and your heart’s output has increased 30 to 50 percent to match. Your hair may be thicker, your nails may grow faster, and the “pregnancy glow” (from vasodilation and increased oil) may appear. Visible veins are common, and heartburn may return as progesterone relaxes the esophageal sphincter. Hair shedding slows, and some women begin to experience leg cramps [2].

Tips for Week 11

• Get your NT scan this week or next (the window runs 11w0d to 13w6d) — it measures fluid at the back of the fetal neck and, combined with a blood test for free beta-hCG and PAPP-A, forms the first-trimester screen. The combined detection rate for trisomy 21 is about 85 to 90 percent [1].
• Eat for performance and recovery — if you’re still running, focus on carbs and protein. Good pre- and post-workout options include dates, a banana with nut butter, or Greek yogurt with berries.
• Strengthen your pelvic floor — three sets of 10 Kegels, three times a day. Consider adding prenatal yoga to your routine.
• Update your wardrobe baseline — pick up leggings, looser tops, and a supportive bra (both sports and regular). Hold off on full maternity wear, but replace non-stretch items that no longer fit comfortably.

Things To Do (Checklist)

• Get NT scan + first-trimester blood work
• Discuss NIPT results if done in week 10
• Continue prenatal vitamin + iron-rich foods
• Add prenatal yoga or pelvic floor exercises
• If still running: focus on fueling + recovery

Frequently Asked Questions

Q: Is my NT measurement normal? A: A normal measurement is under 3 mm. Anything above 3 mm signals increased risk for trisomy 21, trisomy 18, or heart defects, and is interpreted alongside the blood test for an overall risk score. Follow up with NIPT or amniocentesis if needed [1].

Q: My hair and nails are growing fast — normal? A: Yes. Estrogen extends the anagen (growth) phase, so enjoy it — though it will revert after delivery [2].

Q: When can I feel the baby move? A: First-time moms typically feel movement between 18 and 22 weeks, and earlier (around 16 to 18 weeks) in subsequent pregnancies. This “quickening” often feels like flutters, gas, or bubbles [2].

Sources

1. ACOG — How Your Fetus Grows During Pregnancy
2. Mayo Clinic — 11 Weeks Pregnant
3. What to Expect When You’re Expecting — Heidi Murkoff (Chapters 5-6: First Trimester Symptoms)