Definition and development
In vitro fertilization (IVF) refers to the process of cultivating embryos in the laboratory through in vitro fertilization (IVF), and then implanting the embryos into the mother's uterus to achieve pregnancy and delivery. IVF technology first appeared in the 1970s, aiming to help couples unable to conceive naturally achieve their reproductive aspirations. With the continuous development of science and technology and the progress of medicine, IVF technology is also constantly innovating and improving, entering the fourth generation.

The breakthrough of the fourth generation IVF technology compared with previous generations is mainly reflected in the following four aspects: gene screening, embryo selection, auxiliary technology and pre pregnancy testing.
Gene screening
One of the important breakthroughs of the fourth generation IVF technology is gene screening. Some genetic diseases and chromosomal abnormalities can be screened by genome wide detection of embryos, so as to avoid passing these problems on to future generations. Some formal medical institutions and IVF hospitals, such as Beijing IVF Hospital and Shanghai IVF Hospital, have started to provide gene screening services. This allows couples to choose healthy embryos to minimize the risk of childhood illness.
In addition, gene screening can also help couples screen out some gene related factors such as personality characteristics and intelligence level, so as to provide them with more comprehensive information, so that they can better understand the potential strengths and weaknesses of their future children, and prepare for education and future planning.
Embryonic selection
The fourth generation IVF technology has made significant breakthroughs in embryo selection. By using advanced microscope and digital image processing technology, professional doctors can more accurately assess the quality and development potential of embryos, as well as the risk of genetic abnormalities. These advanced technologies enable doctors to select the most promising embryos, improve the success rate of IVF and reduce the risk of multiple pregnancies.
In addition, the fourth generation IVF technology also introduces the embryo incubator technology, which can simulate the uterine environment in the laboratory and provide more suitable culture conditions. This technology can better maintain the healthy state of embryos, promote their development and growth, and thus improve the success rate in the process of IVF.
Auxiliary technology
The auxiliary technology in the fourth generation IVF technology has also made an important breakthrough. An important auxiliary technology is hormone therapy. Through rational use of hormones, doctors can regulate female hormone levels, promote follicular development and ovulation, and increase the chance of pregnancy. In addition, hormone therapy can also help adjust the status of endometrium and provide a good environment for embryo implantation.
In addition, assisted technology also includes screening and improvement of sperm quality, optimization of embryo culture technology, etc. These breakthroughs in assistive technology not only improve the success rate of IVF, but also reduce the risk of pregnancy complications.
Pre pregnancy testing
The fourth generation IVF technology also includes more comprehensive prenatal testing. In addition to gene screening, professional hospitals also provide detailed examination of the physical conditions of couples. These examinations can help doctors assess the health status of couples, understand potential fertility problems, and provide appropriate treatment and guidance. The comprehensive pre pregnancy testing can ensure the success of IVF and reduce the occurrence of adverse results.
summary
The fourth generation IVF technology has made breakthroughs in gene screening, embryo selection, auxiliary technology and pre pregnancy detection. These breakthroughs make IVF technology more accurate, safe and efficient. Through precise gene screening and embryo selection, doctors can select embryos with greater health potential and improve the success rate of fertility. The improvement and optimization of auxiliary technology further improved the success rate of IVF and reduced the risk of complications. Pre pregnancy testing ensures that couples can have a smoother birth process. The fourth generation of IVF technology has brought hope and joy to couples who cannot conceive naturally.