Sperm: my name is sperm, my external shape like a tadpole, the whole length of 60 microns, is the smallest cell in the human body, but also can not grow and develop the cell. Ovum: My name is ovum, the mature me is up to 15 millimeters in diameter and is the largest cell in the human body. Sperm: Every time my father ejaculates, 200-500 million of my siblings will be born. Among them, about 40% have abnormal morphology and low intelligence. Egg: My mom will only give birth to one of me at a time, and at most, only two of my siblings will be born at the same time. And only one, at most two, sperm are allowed to combine with us at the same time. Sperm: Oh, it looks like there’s going to be a matchmaking competition between us brothers! We enter the human body, to break through a difficult obstacles, it takes 4-5 hours, all depends on our own ability, and ultimately only strong, energetic brothers can have the honor of marriage with you. And those weak and deformed brothers are eliminated one by one on the way. Eggs: Please don’t ever act blindly, yo. If you choose the wrong partner and cause a miscarriage or give birth to a child with low intelligence or deformities, you will regret it! Sperm: Tell me what’s going on! Egg: In order to have a smart, healthy and dexterous child, we must strive to obtain the best genetic qualities of our parents. So to those who are interested in the groom, must accept my preferential conditions: first of all, the father’s age in 25-40 years old, because when the father 25, sperm quality, density, mobility have reached its peak, and 40 years old after the gradual decline, weakening. Sperm: Actually I only like healthy and fresh eggs. 24-29 years old mother’s eggs of the best fertile age are the ideal choice for me. Eggs: I have existed in my mother’s womb since she was a fetus. Thanks to my grandmother’s strict control, I am protected from hereditary or unfavorable factors, and I retain my healthy, intact qualities. Sperm: this I know. There are many unfavorable factors affecting our health in life, such as tobacco, alcohol, nitrites in preservatives, coloring agents, DDT in pesticides, insecticides, etc., automobile exhaust, ionizing radiation, methylmercury, lead, cadmium, and so on, are all factors affecting and harming us, and can cause mutations in the genes. Eggs: There are also 56-75 days from spermatogonia to the formation of sperm, during which the father’s sperm must be protected from harm. Sperm: What other conditions are there? Egg: I have to choose sperm from a father who has no history of infectious disease. If you contract brucellosis, tuberculosis, etc., the massive consumption of nutrients will cause the sperm to die in the process of production, and even if you are fortunate enough to survive, you will be weak and mentally retarded. If infected with mumps, and then complicate testicular inflammation, fall azoospermia can be bad. Sperm: It’s no problem, my father’s health is great. In order to ensure the quality of my recent special attention to avoid some of the factors that increase the temperature of the testicles, such as not using hot water baths, do not wear pants, jeans, diet also pay special attention to zinc-containing food intake, because the lack of zinc can lead to sexual function to reduce spermatogenesis and so on. Eggs: and slow, before planning a pregnancy can be to abstain from sex yo! Excessive sex can reduce the volume of semen, sperm count drops, and semen can be mixed with immature sperm. Especially I need to abstain from sex for 2-3 days before birth (ovulation). Sperm: there’s more important yet! Because I start aging 48 hours after elimination and you start aging 6 hours after elimination, the best time for fertilization is 2-3 hours after ovulation, so feel free to have intercourse the day before and on the day of ovulation. Egg: I like you because you have excellent quality, lively and strong and full of wisdom. Sperm: I have gone through a lot of difficulties and dangers to finally find you, my beloved egg, you are beautiful, healthy and fresh. Together: we have concentrated the best qualities of our parents, and our union is the most perfect one. The fruit of our love will be a smart, healthy and lively baby!