Week 7 of Pregnancy
Learn about your baby's development and what to expect at 7 weeks pregnant.
Baby's Size This Week
Baby Development at Week 7
- ● Your embryo is about 1 cm long — roughly the size of a blueberry — and growing at about 1 mm per day.
- ● The brain is generating about 100 new nerve cells every minute, forming the basis of the central nervous system.
- ● Arm buds are developing elbow joints, and the fingers are beginning to differentiate (though still webbed together).
- ● The liver is producing red blood cells, a job it will handle until the bone marrow matures later in pregnancy.
- ● Facial features are becoming more defined: the mouth, nostrils, and lens of the eyes are forming distinctly.
- ● The appendix and pancreas are developing, and the intestinal tract is lengthening rapidly into loops outside the body cavity.
Your Body at Week 7
- ● Morning sickness may peak between weeks 7-9 for many women, with nausea that can last throughout the entire day.
- ● You may notice your skin breaking out due to hormonal changes, or alternatively experiencing a pregnancy glow.
- ● Food cravings and aversions may become more pronounced — strong reactions to certain smells are very common.
- ● Constipation may begin or worsen as progesterone relaxes smooth muscle throughout the digestive tract.
- ● Slight weight gain or loss is normal — extreme morning sickness may cause temporary weight loss without harm.
- ● You may feel emotional and more sensitive than usual due to hormonal fluctuations and the reality of early pregnancy.
Week 7 Checklist
- ☐ Continue taking your prenatal vitamin with folic acid every day without interruption.
- ☐ Eat fiber-rich foods (beans, oats, fruits, vegetables) and drink plenty of water to help prevent constipation.
- ☐ Ask your provider about safe over-the-counter remedies for common pregnancy discomforts like heartburn and constipation.
- ☐ Begin researching prenatal care options if you have not already: OB-GYN, midwife, or family practice.
- ☐ Consider starting a pregnancy journal to document milestones, feelings, and questions for your provider.
- ☐ Avoid changing cat litter, which can carry toxoplasmosis parasites dangerous to the developing embryo.
Frequently Asked Questions
Is it normal to not have symptoms at 7 weeks?
Yes, every pregnancy is different. Some women have very few symptoms in the first trimester and still have completely healthy pregnancies. The presence or absence of symptoms does not reliably predict pregnancy outcome. If you are concerned, talk to your provider, but try not to compare your experience to others.
How much weight should I have gained by 7 weeks?
Very little to no weight gain is expected by 7 weeks. In the first trimester, the recommended total weight gain is only 1-4 pounds. Some women actually lose a few pounds due to morning sickness, and that is normal as long as you are staying hydrated. Significant weight gain occurs primarily in the second and third trimesters.
Can I exercise during the first trimester?
Yes, moderate exercise is generally safe and beneficial during the first trimester. Walking, swimming, prenatal yoga, and stationary cycling are excellent options. Aim for 150 minutes of moderate activity per week. Avoid contact sports, activities with fall risk, and exercises on your back after the first trimester. Always consult your provider before starting a new exercise routine.
What is causing my food aversions?
Food aversions are primarily caused by rising hCG levels and heightened sense of smell. Some researchers believe aversions evolved to protect the developing embryo from potentially harmful foods. Common aversions include meat, eggs, coffee, and strong-smelling foods. They typically improve in the second trimester as hormone levels stabilize.
Is constipation during pregnancy normal and what can I do?
Yes, constipation affects up to 40% of pregnant women. Progesterone relaxes smooth muscles throughout the body, including the intestines, slowing digestion. Iron in prenatal vitamins also contributes. To manage it: increase dietary fiber (aim for 25-30 g/day), drink 8-10 glasses of water daily, exercise regularly, and try prune juice. Ask your provider about safe stool softeners like docusate sodium if needed.
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.