Title: Embryo vs. Fetus: What’s the Difference?
Headings: Embryo vs. Fetus: Fetal Development Week-by-Week
Embryo vs. Fetus: Fetal Development Week-by-Week
What’s a Zygote?
Embryo vs. Fetus
The First 10 Weeks of Pregnancy
Weeks 1 and 2: Preparation
Week 3: Ovulation
Week 4: Implantation
Week 5: Embryonic Period Starts
Week 6
Week 7
Week 8
Week 9
Week 10: Embryonic Period Ends
Week 11 and Beyond
Late First Trimester
Second Trimester
Third Trimester
Miscarriage
Your First Prenatal Appointment: What to Expect
The Takeaway

Content: Embryo vs. Fetus: What’s the Difference? Parenthood
Pregnancy
Embryo vs. Fetus: Fetal Development Week-by-Week
Medically reviewed by Dan and Jennifer Digmann — Written by Ashley Marcin on March 14, 2016
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With each week of pregnancy, your baby-to-be is developing leaps and bounds. You might hear your doctor talk about different phases of pregnancy with specific medical terms like embryo and zygote. These describe your baby’s stages of development. Here’s more about what those terms mean, what your baby is up to week-by-week, and what you can expect along the way. What’s a Zygote? Fertilization is a process that usually happens within a few hours of ovulation. It’s that critical point in reproduction when the sperm meets the newly released egg.