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Dr. david phillips at the moment of fertilization [USA] 1992

1992, geneticist Dr. david phillips photographed the moment when human sperm entered the egg for the first time through the scanning electron microscope. This is the first time that human beings can "see" the secret of chemical changes on egg cells during pregnancy with the help of electron microscope photography.

In this micrograph, Dr. Philip clearly recorded a series of biochemical reactions triggered by the moment sperm entered the egg. "For life, this moment is a revolution." Dr. Philip explained: "200-500 million sperm in one ejaculation set foot on a dangerous journey to the fallopian tube in a short time." This process is extremely difficult, which is tantamount to a creepy adventure. Many factors lead to the death of most sperm on the way. For example, the ability of oviduct peristalsis and anti-peristalsis, the contractility of oviduct wall muscles, the oscillation of oviduct epithelial cilia, the flow and countercurrent of oviduct fluid are all directly related to the operation of sperm in oviduct. Countless sperm are excreted in this process, or "eaten" by white blood cells in genitals as invading enemies. Only no more than 200 sperm can really reach the ampulla of fallopian tube at the fertilization site. Normally, only one of them can. ...