Blastocyst is an embryonic structure formed in the early embryogenesis of mammals after the formation of the morula, but before implantation.
The fertilized egg in an early stage of cell division when the cells form a hollow sphere.
An early stage in the development of an embryo.
Embryonic stage, following the morula stage in human development, characterized by a spherical ball of cells with a central fluid-filled cavity (blastocele); during this time, usually about the eighth day after fertilization, implantation in the wall of the uterus occurs.
An early stage of embryonic development that consists of a hollow ball of cells with a localized thickening (the inner cell mass) that will develop into the actual embryo; the remainder of the blastocyst is composed of ‘trophoblast. At first the blastocyst is unattached, but it soon implants in the wall of the womb (uterus).
In mammalian embryo development, the stage that follows the morula. It consists of an outer layer, or trophoblast, and an inner cell mass, from which the embryo will develop. The enclosed cavity is the blastocele. At this stage, implantation in the endometrium (lining of the uterus) occurs.
A hollow, spherical structure made up of about 500 cells, formed when a zygote divides and grows.
In the journey towards achieving pregnancy, a cluster of cells, resulting from multiple cell divisions following the successful union of an ovum and a sperm within the Fallopian tube, takes shape. This developmental entity must then exit the Fallopian tube, traverse into the uterus, and implant itself within the uterine lining in order to establish a viable pregnancy.
A group of cells that originates from a fertilized egg and expands to form an embryo.