Egg is a bride who loves darkness
After 36 hours of ovulation induction, the owner of the egg will be taken out by medical staff, and it will lie quietly in a colorless and tasteless container like a shy bride.
"The staff of our laboratory should fully consider the requirements of these little guys when selecting shampoo, and select those without fragrance, let alone perfume. Otherwise, they may be asked out of the laboratory," said Dr. Xu Weihai, the reproductive medicine laboratory of Run Run Shaw Hospital.
After 4 to 6 hours, 20000 to 30000 sperm are placed in the container where the eggs are placed, allowing them to freely fall in love. The fastest sperm can first pick up the beauty. After 14 to 18 hours, the zygote is formed; After 3 days, she officially entered the body of the woman who was preparing to conceive.
Sperm is a mischievous loach
Under a microscope magnified at 400 times, you will find that the sperm are like arrow arrays in martial arts films, black and pressing, rushing towards you. Each sperm is swinging its propeller like tail and scurrying everywhere
Not all sperm are healthy, and rounded heads or lack of acrosome are unhealthy sperm. In this case, technicians need to select the healthiest of them and combine them with the egg.
Sperm swims rapidly at the speed of their own length per second, only slowing down when technicians add a sticky reagent like glue.
However, this does not mean that they will obediently obey. A spiral needle barrel with a special needle was held by Xu Weihai. This needle with a diameter of 6 microns is so thin that only a faint white shadow can be seen under the light.
A beginner who wants to become a master at catching sperm takes just one year of beginner training. And a master can reach a speed of catching 100 pieces per minute.
This extremely thin needle has a 35 degree angle and gently scratches the tail of the sperm, quickly sucking it into the syringe. And the egg was already fixed to one side by another special syringe.
The technician gently rotated the spiral needle to push the sperm out and smoothly reached the cytoplasm of the egg cell, completing the fertilization process.