A newly developing human is typically referred to as an embryo until the ninth week after conception, when it is then referred to as a fetus. In other multicellular organisms, the word …

Dec 28, 2025 · An embryo is the early developmental stage of an animal while it is in the egg or within the uterus of the mother. In humans the term is applied to the unborn child until the end …

Fetal Development Within 24 hours after fertilization, the egg that will become your baby rapidly divides into many cells. By the ninth week of pregnancy, the embryo develops into a fetus. …

Jul 21, 2025 · In humans, the developing organism is referred to as an embryo from the first cell division until about the eighth week after fertilization. The journey of an embryo starts with …

Aug 13, 2023 · An embryo is a newly fertilized egg (zygote) up till the eighth week of development as it transforms through the morula, blastula, gastrula, and organogenesis stages.

Oct 14, 2025 · An embryo is the early stage of development and lasts from week five to week 10 of pregnancy. A fetus is the later stage of development and lasts from the end of week 10 until …

In humans, the embryo is defined as the organism from the time of implantation in the uterus until about the eighth week, while the fetus is the stage from this time until birth.

Use the stage number links to images and information about each specific stage of human development over the first 8 weeks. The links below give a broad overview of developmental …

Jul 15, 2025 · 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 …

: an animal in the early stages of development that are marked by cleavage, the laying down of the basic tissues, and the formation of primitive organs and organ systems compare fetus. : a …