The home of human sperm is the testes, a magical place where sperm grows and develops, and when the sperm grows to “adulthood”, they reluctantly leave their homeland and run to a “foreign country” to find their “The spermatozoa have a rounded shape and a rounded body. The sperm has a round head and a long, thin tail, and looks very much like a frog’s juvenile tadpole. However, it is many times smaller than a tadpole and is invisible to the naked eye. Under a microscope, spermatozoa can be seen wagging their tails rapidly, crawling forward without looking back, and their courageous spirit is destined to prosper for human reproduction. After the sperm matured in the testicles, they embarked on a long journey in groups, and when passing through the epididymis, they took some “walking bags” and “dry food” and came together through the vas deferens to the “staging area “(seminal vesicles). This is the transfer station for the sperm, where they are “ready to go”. When ordered, the sperm passes through the male urethra and reaches the female vagina (the normal number of sperm per ml for a man is 20 – 600 million per ejaculation into the vagina). The sperm arrives deep in the vagina, as if in a “mountain hollow”, where they rest a little and then put on their own “bags” and “food” and start The spermatozoa have to climb up to a “mountain hollow” to find a “couple”. First the sperm have to climb a “hill” (cervix) and then go through a “tunnel” (cervical canal) to reach an open area (uterine cavity). The spermatozoa climb up the gentle slope of the uterine cavity step by step, and many old and weak spermatozoa are already “panting” and exhausted when they go uphill; some even accidentally fall into the “deep valley” and are buried in the “mountain”; due to the long journey, the spermatozoa are buried in the “valley”. Due to the hardship and exhaustion of the long journey, some surviving sperm have lost the strength and perseverance to climb forward, giving up the “courtship” journey halfway and dying alone on the spot. Only some of the “strong” and “determined” sperm can climb to the top of the “hill”. When these “victors” have reached the summit, they look in the “east and west” directions and see two circular “galleries” (bilateral oviducts), at which point the sperm are divided into two parts, some going east and some going east. The spermatozoa are divided into two parts, some going east and some going west. After traversing this long and narrow corridor, the sperm come to a more spacious depression like a “lotus pond” (the abdomen of the fallopian tubes) where they look for and wait for their “lover” (the egg) to arrive. In a normal adult woman, only one ovum is released from one ovary each month, and ovulation often occurs once in the last 10-14 days of the menstrual cycle. The spermatozoa are already very tired after their long and arduous journey and have very little “dry food” left, which usually lasts only 1 – 2 days. Therefore, only sperm arriving at the ovary around the time of ovulation can meet their “lover”, while those arriving at other times are in vain and are buried in a “foreign country” in pursuit of their intended lover. The sperm arriving at the “date” are tired, but their eyes are looking around, focused and eager. When they find their “lovers”, they rush forward in a flurry and scramble to the egg’s “house”, some “knocking” desperately; some “shouting” loudly. Some “shouted”: “Open the door, girl! The noise at the door woke up the sleeping egg girl and she said impatiently, “What’s all the noise? My mother said that I was only allowed to pick one “person” to come in. The egg girl lies in front of the “window”, looks around, picks out the right and left, and finally chooses a strong, handsome sperm, so she quietly opens the “door” and welcomes the desired person into the door. This sperm is the lucky one among the billions of sperm that will be married to the egg for “a hundred years”. The sperm proudly leads the egg girl to say goodbye to her “hometown” and return to the uterine cavity, where they choose the most “fertile” land to “settle down”. After ten months of hard work, a new life is born.