Gender differences between the two sexes are mainly manifested in the sex chromosomes, sex hormones, reproductive organs and secondary sexual characteristics, etc. Firstly, the sex chromosomes of males are XY while those of females are XX. Gender differences between men and women are first reflected in the chromosomes, male sex chromosomes are XY, while female sex chromosomes are XX. after puberty, male sex hormones are androgens, while female sex hormones are mainly estrogens. The external genital organs of males mainly consist of the penis, prepuce, glans, scrotum, etc. The internal genital organs include the epididymis, testes, vas deferens, seminal vesicle glands, prostate gland, etc. The external genital organs of females include the mons veneris and the mons veneris. The external genital organs of females include the mons pubis, clitoris, labia majora and minora, and the vaginal opening, while the internal genital organs include the ovaries, vagina, uterus, fallopian tubes and so on. In terms of secondary sexual characteristics, males are mainly characterized by tall physique, prominent laryngeal knots, thick voice, thick body hair, long beard and underdeveloped breasts, etc. Females are mainly characterized by petite physique, long beard and underdeveloped breasts. In females, they are mainly petite, with a lot of subcutaneous fat, fine sweat hair, breast development, first menstruation, wide pelvis, and an inconspicuous laryngeal knot and no beard. To summarize, there are gender differences between men and women, and if you feel unwell, you should seek medical attention.