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 …

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 of the …

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.

: 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 …

6 days ago · What Is an Embryo? An embryo represents the early stage of a baby's development during pregnancy. Initially, a fertilized egg, known as a zygote, divides and forms a blastocyst. This moves …

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 · 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 fertilization, the …

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 …

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 …

Mar 19, 2024 · One structure eventually becomes the embryo (and later, the fetus) and the other becomes the placenta. Cell division continues at a rapid pace. Eventually, the zygote turns into a …