Week 9 of Pregnancy
Learn about your baby's development and what to expect at 9 weeks pregnant.
Baby's Size This Week
Baby Development at Week 9
- ● Your baby is now officially called a fetus and is about 2.3 cm from crown to rump — the size of a green olive.
- ● All essential organs have formed in basic structure and are beginning to function in a coordinated way.
- ● The heart has completed its four-chamber development and pumps about 25 quarts of blood per day.
- ● Bones are beginning to harden (ossify), replacing the soft cartilage framework that formed earlier.
- ● Tiny tooth buds are forming beneath the gum line, laying the groundwork for all 20 future baby teeth.
- ● The digestive tract muscles are developing, and the liver, spleen, and gallbladder are becoming functional.
Your Body at Week 9
- ● Morning sickness may still be significant, though it often begins to ease gradually around weeks 9-10 for many women.
- ● Your waistline may start to thicken and feel tighter in fitted clothing, though most women are not visibly showing yet.
- ● Your blood volume has increased substantially, which can cause headaches and occasional dizziness when standing.
- ● Emotional ups and downs continue due to fluctuating hormones and the growing reality of pregnancy.
- ● Nasal congestion (pregnancy rhinitis) may develop due to increased blood flow to mucous membranes in the nose.
- ● Mild acne or changes in skin texture are common due to hormonal shifts affecting oil production in skin glands.
Week 9 Checklist
- ☐ Discuss first-trimester screening options with your provider (nuchal translucency, NIPT) — schedule by week 11.
- ☐ Continue taking prenatal vitamins and eating a balanced diet even if nausea limits your food choices.
- ☐ Start doing pelvic floor exercises (Kegels) daily to strengthen muscles for delivery and postpartum recovery.
- ☐ Research your workplace maternity leave policy and any available disability or family leave benefits.
- ☐ If morning sickness is severe, talk to your provider about prescription anti-nausea treatments like Diclegis or Zofran.
- ☐ Keep a food diary if you are struggling to eat, focusing on whatever you can tolerate — even simple carbs are fine temporarily.
Frequently Asked Questions
What does the nuchal translucency test check for?
The nuchal translucency (NT) test is an ultrasound performed between 11-14 weeks that measures the fluid at the back of your baby's neck. An increased measurement may indicate a higher risk for Down syndrome, trisomy 18, or certain heart defects. It is a screening test (not diagnostic) and is often combined with blood tests for more accurate results.
When does morning sickness go away?
For most women, morning sickness peaks between weeks 7-9 and gradually improves by weeks 12-14 as the placenta takes over hormone production and hCG levels stabilize. About 80% of women find relief by the second trimester. However, some women experience nausea throughout pregnancy. If vomiting is severe, contact your provider.
Is it safe to fly during the first trimester?
Air travel is generally safe during an uncomplicated pregnancy up to 36 weeks. The first trimester is a fine time to fly, though motion sickness may worsen nausea. Stay hydrated, walk around the cabin periodically, and wear compression stockings to reduce blood clot risk. Carry medical records and check airline policies. Consult your provider before traveling if you have complications.
Why am I so congested during pregnancy?
Pregnancy rhinitis affects up to 30% of pregnant women. Rising estrogen levels increase blood flow to the mucous membranes in your nose, causing swelling, congestion, and sometimes nosebleeds. Using a saline nasal spray, a humidifier, and elevating your head while sleeping can help. Avoid medicated nasal sprays unless approved by your provider.
What is the difference between NIPT and amniocentesis?
NIPT is a non-invasive blood test that screens for chromosomal abnormalities using fetal DNA found in the mother's blood — it carries no risk to the baby but is a screening test (not 100% conclusive). Amniocentesis is a diagnostic test where a needle is inserted into the amniotic sac to collect fluid for chromosomal analysis — it is diagnostic (highly accurate) but carries a small risk (0.1-0.3%) of miscarriage. NIPT is typically done first; amniocentesis is offered if NIPT results are abnormal or for higher-risk pregnancies.
Track Your Exact Pregnancy Week
Use our free Pregnancy Week Tracker to find out exactly how far along you are based on your last menstrual period or due date.
Track My Pregnancy →Sources
- ACOG
- WHO Fetal Growth Charts
- Mayo Clinic
Medical disclaimer: This content is for informational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider for guidance specific to your pregnancy.