Why IVF is not successful
In vitro fertilization embryo transfer (IVF-ET) is a common method to treat infertility. However, not all IVF attempts have been successful. The reasons for the failure of IVF will be discussed from several aspects.

Problems not suitable for the recipient or donor
The success of IVF is closely related to the physical conditions of the recipient and donor. First of all, the health of the recipient's uterus is crucial for IVF implantation. If there are abnormalities in the uterus, such as endometriosis, uterine malformation or endometrial gland dysplasia, the success rate of IVF will be greatly reduced. Secondly, the egg quality of the donor (usually the mother or donor) is also an important factor affecting the success of IVF. Age increase, ovarian dysfunction or genetic diseases may lead to the decline of egg quality, thus affecting the quality and development of embryos.
In addition, IVF may be affected by the patient's gene mutation, genetic disease and other factors. Some patients carry harmful mutations or genetic disease genes, and these gene abnormalities will be passed on to the embryo, resulting in abnormal embryonic development or spontaneous abortion. Therefore, in the process of IVF, genetic counseling and screening of receptor and donor genes are particularly important.
Embryo quality problems
The embryo quality of IVF is very important for its success. The quality of embryos is affected by the quality of donor eggs, the culture conditions of fertilized embryos and the timing of embryo transfer. First, the quality of donor eggs depends on donor ovarian function, age and genetic factors. If the ovarian function declines and the egg quality declines, the embryo quality will be affected. Secondly, the quality of embryo culture conditions directly affects the development of embryos. If the culture conditions are poor, or the culture time is too short or too long, it may lead to abnormal embryonic development. Finally, the timing of embryo transfer is also crucial. If the transfer time is not appropriate, such as the embryo development is too fast or too slow, the success rate of IVF will be reduced.
Lifestyle and environmental factors
Lifestyle and environmental factors may also affect the success rate of IVF. Bad living habits such as smoking, excessive drinking, unhealthy diet and lack of exercise will have a negative impact on the development of eggs and embryos, thus reducing the success rate of IVF. In addition, environmental factors such as electromagnetic radiation, air pollution and chemical exposure may also have a negative impact on the success of IVF. Therefore, maintaining a good lifestyle and creating a good living environment are crucial to the success of IVF.
Psychological and emotional stress
Psychological and emotional stress during IVF may also lead to failure. The problem of infertility itself will bring great pressure to both husband and wife, and the treatment and waiting stages in the IVF process will test their patience and emotion. Stress and anxiety may cause the patient's body to be in a state of stress, thus affecting the development of eggs and embryos. Therefore, in the process of IVF, it is particularly important to actively deal with psychological and emotional problems and seek professional psychological counseling and support.
summary
The failure of IVF may originate from many aspects. Unsuitable recipients or donors, embryo quality problems, lifestyle and environmental factors, and psychological and emotional stress may all affect the success of IVF. Therefore, before IVF, taking these factors into consideration and working with doctors to develop personalized treatment plans will help to improve the success rate of IVF.