Whether it is sperm waiting for eggs or eggs waiting for sperm, there is no difference between good and bad, the result is the same, both will fertilize the eggs and form a fertilized egg that will finally return to the uterine cavity to be laid, grow and develop and conceive a fetus. It is recommended that during the preparation for pregnancy, in order to ensure good sperm quality and good egg quality, both spouses should work together to strengthen their nutrition. And to live a regular life, keep a happy mood, especially to quit smoking and drinking, and avoid contact with toxic and harmful gases or objects, so as to achieve the effect of eugenics. So, whether it is sperm waiting for eggs or eggs waiting for sperm, it is normal and there is no good or bad.