What are the causes of non-union of sperm and egg? Let's give you a popular science.
Non-union of sperm and egg can occur in the natural state or in an IVF cycle. Some couples have normal examinations, that is, they are not pregnant, and the reason for the consideration may be sperm-egg union disorder, which we cannot check through routine examination methods, and only in IVF can we find out.
So what is the reason why the sperm and egg do not combine?
There are many reasons! It may be that the quality of the egg is not good enough, or it may be that the fallopian tube passage where the sperm and egg meet is not smooth enough, or it may be because the number, motility and density of the man's sperm cannot meet the conditions of fertilization in the uterine cavity, which is in a natural state.
If in the state of IVF, we put the sperm and egg together, that is, the first generation of IVF, and they still do not combine, then the reason may be the density and motility of the sperm; It may also be due to abnormal expression of some genes in the zona pellucida of the egg, or sclerosis of the zona pellucida, which may cause the sperm to not burrow into it properly; It is also possible that some enzymes are not activated properly after fertilization, and so on.
Do you understand?
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