Female reproductive organs include pubic mound, labia majora, labia minora, clitoris, vestibule, vestibule gland, vaginal opening and hymen. The pubic mound consists of the skin before pubic symphysis and a thick fat layer, with pubic hair on the skin. The labia majora is a rectangular bulge on both sides of the vulva, with a layer of fat under the skin and rich blood vessels and nerves. The labia minora is a pair of thin folds inside the labia majora, with moist reddish surface, rich blood vessels, rich nerves and keen sense. At the tip of labia minora on both sides of the penis, there is sponge tissue. The penis is equivalent to the male penis head, with rich nerve endings and very sensitive. The space around labia minora on both sides is called vestibule. The anterior chamber bulb is located on both sides of the vestibule and consists of venous plexus, which can erect. Vestibular glands are located on both sides of the vaginal opening, behind the vestibule, one on the left and one on the right, the size of soybeans.

When excited, it secretes yellow-white mucus and lubricates the vaginal opening. The vaginal orifice is below the urethral orifice, and there is hymen around it. There is a hole in the center of the hymen. The shape, size and thickness of the hole vary from person to person.

The shape of female external genitalia varies greatly. There are significant differences in the types and quantities of pubic hair; The labia are different in size, pigmentation and shape; The size and shape of penis are different; The position of urethra and vaginal orifice is different. Under the condition of asexual stimulation, labia majora is usually combined with the midline to provide mechanical protection for urethral orifice and vaginal orifice.

Finally, a brief talk about fertilization. After the egg is discharged from the ovary, it takes about 3 to 4 days to enter the uterus. Please stay in the ampulla of fallopian tube for 2~3 days before entering the uterus. During sexual intercourse, after sperm is injected into vagina, it moves into uterine cavity together, and finally meets the egg on the fallopian tube, but generally only one sperm finally enters the egg and becomes a fertilized egg. The fertilized egg is implanted into the uterine wall and gradually develops into a fetus.