Physical development criteria of test tube infants after 15 days
IVF is a kind of embryo that is cultivated in the laboratory through artificial assisted pregnancy technology, and then transferred to the mother for development. The 15 day old IVF is in the early stage of embryonic development. At this time, the main development is the basic tissue layer of the embryo. In the following four aspects, the overall development of IVF after 15 days is described in detail.
1. Nervous system development
In the second week of the late embryonic stage, the neural embryo began to form. Fifteen days later, the central nervous system (CNS) of IVF has developed to the spine, brain and brain stem regions. At this time, the nerve conduit in the head has formed the spine. The nervous system of IVF began to develop nerve cells and nerve fibers, laying the foundation for the future development of the brain and spinal cord.
In addition, the nervous system of 15 day old test tube babies is still gradually developing the differentiation of the central nervous system and the formation of core organs, including the emergence of the brain ventricle and the formation of the basic structure of the brain hemisphere.
To sum up, 15 day old IVF babies have taken shape in terms of nervous system development, but still need a longer time to develop and mature.
2. Organ phylogeny
After 15 days of embryonic development, all organ systems of IVF are in the early stage of formation and development. At this time, embryonic visceral organs such as heart, lung, liver and kidney have begun to differentiate.
The heart is one of the earliest organs to form and work in IVF. After 15 days, the IVF baby's heart began to beat regularly to deliver nutrients and oxygen.
In addition, the digestive system, urinary system, respiratory system and other organs of IVF are also gradually forming and starting to play their functions.
In general, the organ system of 15 day old IVF has begun to form, but it still needs further development and improvement.
3. Muscular and skeletal system development
The development of muscle and bone system of IVF also began after 15 days. At this time, the limbs of IVF have already had the basic limb framework, and begin to differentiate into limb segments and muscles.
The skeletal system of 15 day old IVF is still fragile, and the skeleton still exists in the form of cartilage. However, this stage is the starting point for the rapid growth of bones, and the future bone system will gradually develop a real bone structure.
The development of muscle system is the basis for IVF to perform activities. At this time, the muscles of IVF began to differentiate into different types and gradually established basic muscle tissue throughout the body.
4. Perception and consciousness development
The development of perception and consciousness of 15 day old IVF infants is still in its infancy. At this point, IVF can respond to external stimuli and begin to build some basic perception and cognitive abilities.
At this stage, IVF will respond to stimuli such as sound, light and touch. Although consciousness is still relatively low, IVF's nervous system is actively developing and connecting, laying the foundation for more complex perception in the future.
To sum up, 15 day old IVF babies have made initial progress in the development of perception and consciousness, but still need further time and growth.
Summary
The overall development standard of test tube infants after 15 days has made significant progress in the development of nervous system, organ system, muscle and bone system, perception and consciousness. However, these developments are only at an early stage and still need a longer time and a good growth environment to improve. Understanding and paying attention to the development standards of IVF is essential to promote its healthy growth and development.
