Sperm: My name is sperm, and I am shaped like a tadpole, with a total length of 60 microns. I am the smallest cell in the human body and can no longer grow.
Egg: My name is Egg, and when I mature, my diameter reaches 15 millimeters, which is the largest cell in the human body.
Sperm: Every time my father ejaculates, my siblings are born between 200 million and 500 million people. Among them, abnormal morphology, low intelligence and light body account for about 40%.
Egg: My mother only gave birth to me one person at a time, and only two siblings sisters at most. And only one sperm is allowed to combine with us at most two at the same time.
Sperm: Ah, it seems like we are going to have a relative competition between our brothers. After entering the human body, it takes 4 to 5 hours to overcome difficulties and dangers. Relying on our own abilities, only strong and energetic brothers can be lucky to marry you in the end. The brothers with weak and deformed bodies were eliminated midway.
Egg: Never act blindly. If you choose the wrong partner, resulting in miscarriage, intellectual disability, or deformed children, you will regret it!
Sperm: What do you want to say?
Eggs: In order to have a smart, healthy, and intelligent child, we must win the best genetic qualities from our parents. Therefore, to pay tribute to the intended husband, I must accept my priority conditions: firstly, my father's age is between 25 and 40 years old. At the age of 25, the quality, density, and mobility of his sperm reach their peak, and gradually decline and weaken after the age of 40
Sperm: Actually, I only like healthy and fresh eggs. A mother between the ages of 24 and 29, who is the most suitable age for childbirth, is my ideal choice.
Eggs: My mother's fetal period exists in her body, thanks to her strict examination, which is not affected by genetics and adverse factors, and preserves my healthy and complete quality.
Sperm: I know. There are many adverse factors that affect our health in daily life, such as nitrite in tobacco and alcohol preservatives, machine colorants such as pesticide droplets, car exhaust such as insecticides, ionizing radiation, methylmercury, lead, cadmium, etc. These are all factors that affect us and can cause genetic mutations.