Implantation (embryology)
Implantation (embryology)
Implantation (pronunciation: /ɪm.plænˈteɪ.ʃən/) is a critical stage in human reproduction where the blastocyst (early stage embryo) attaches itself to the wall of the uterus.
Etymology
The term "implantation" is derived from the Latin word 'implantare', meaning 'to plant or embed'. In the context of embryology, it refers to the embedding of the blastocyst into the uterine wall.
Process
Implantation begins approximately one week after fertilization, when the blastocyst adheres to the uterine wall. This is facilitated by the endometrium, the inner lining of the uterus, which undergoes changes to prepare for the potential of pregnancy. The blastocyst then invades the endometrium, embedding itself within the tissue in a process known as endometrial decidualization.
Related Terms
- Blastocyst: An early stage embryo that has divided into many cells and contains a cavity filled with fluid.
- Endometrium: The inner lining of the uterus that undergoes changes during the menstrual cycle in preparation for potential pregnancy.
- Fertilization: The process where an egg cell (ovum) and a sperm cell combine to form a single cell, known as a zygote.
- Decidualization: The process by which the endometrium transforms in preparation for pregnancy, allowing for implantation of the blastocyst.
See Also
External links
- Medical encyclopedia article on Implantation (embryology)
- Wikipedia's article - Implantation (embryology)
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