Embryo - Wikipedia An embryo ( ˈɛmbrioʊ EM-bree-oh) is the initial stage of development for a multicellular organism In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell
Embryo | Description, Characteristics, Development | Britannica In humans the term is applied to the unborn child until the end of the seventh week following conception; from the eighth week the unborn child is called a fetus A brief treatment of embryonic development follows For full treatment, see morphology: Embryology
Embryo vs. Fetus: What’s the Difference? - Healthline In human pregnancies, a baby-to-be isn’t considered a fetus until the 9th week after conception, or week 11 after your last menstrual period (LMP) The embryonic period is all about the formation
Embryo - Definition and Examples - Biology Online Dictionary In Biology, an embryo is designated as the initial phase of development for a multicellular organism arising after the fusion of a sperm cell (male sex gamete) and an egg cell (female sex gamete released during a woman’s reproductive cycle) during the process of fertilization
Stages of Fetal Development | Ask A Biologist Not only do embryos get bigger during that time, but they also go from being just a simple, single, cell to being the many cells that make up a human All of a human’s features, organs, and body systems form when they're in the womb
What is an Embryo? (with pictures) - AllTheScience 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 may be considered an embryo until around the eighth week of pregnancy, at which point it is termed a fetus