Sinh sperm rồi mới sinh cha
Ngô Quang Hưng | 12 tháng 06, 2007 | 
Bản để in
Sắp đến Father’s Day, tờ New York Times có bài ca tụng các vận động viên bơi lội, bọn biến đàn ông thành cha. Luật số lớn (law of large numbers):
But men have the overwhelming quantitative edge in the gamete games. Whereas current evidence suggests that a human female is born with all the eggs she will have, and that only about 500 of her natal stock of one million will ever ripen and have a shot at fertilization, a male from puberty onward is pretty much a nonstop sperm bakery. Each testicle generates more than 4 million new sperm per hour, for a lifetime total of maybe 12 trillion sperm per man (although the numbers vary with the day and generally slope downward with age).
The average ejaculation consists mostly of a teaspoon’s worth of nonspermic seminal fluid, a viscous mix of sugars, citric acid and other ingredients designed to pamper and power the sperm cells and prepare them for difficult times ahead; the sperm proper account for only about 1 percent of the semen mass. Yet in that 1 percent may be found 150 million sperm, 150 million human aspirants yearning to meet their mammoth other halves.
Hay nhỉ, vậy chặn dưới là 150/4/2 ~ 20 tiếng mới đủ sperms để phóng một lần.