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 embryo can be used …

Mar 6, 2026 · 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 of the seventh …

3 days ago · An embryo is the earliest stage of a developing baby, spanning from fertilization (when sperm meets egg) through the first eight weeks of development. After those eight weeks, it’s called a …

: 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 tiny young plant …

Apr 12, 2023 · During each week of pregnancy, your baby is growing. Here’s a look at what medical terms like embryo and fetus mean in terms of development.

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.

Jul 21, 2025 · An embryo represents the initial stage of development in a multicellular organism. This period is characterized by rapid cell division and the establishment of the basic body plan.

embryo An organism in its earliest stages of development, especially before it has reached a stage at which it can be distinguished from other species. The human embryo is so called up to the eighth …

Learn about each step of conception (getting pregnant), including sperm transport, egg transport, fertilization and embryo development and implantation.

May 21, 2024 · What is an Embryo? An embryo is an organism in the early stages of development which cannot survive on its own. The precise definition of it varies; in humans, for example, a fertilized egg …