Embryo
Current as of: May 29, 2019
Author: Healthwise Staff
Medical Review:Sarah A. Marshall, MD – Family Medicine & Adam Husney, MD – Family Medicine & Kirtly Jones, MD – Obstetrics and Gynecology, Reproductive Endocrinology
When a fertilized egg has implanted in the uterus, the group of cells that will become a baby is called an embryo. A developing, fertilized egg is known by several names within the first 2 weeks after conception, including zygote, morula (day 4), and blastocyst (day 5). The embryonic period lasts until about 8 weeks…