Sexual organ develpment
At eight weeks, the internal genitalia will begin to form. Gene actively recruits other genes that begin to develop the testes, and suppresses genes that are important in female development. Without testosterone, these same cells differentiate into the clitoris. For proper reproductive function in the adult, one set of these ducts must develop properly, and the other must degrade. Testosterone produced by leydig cells in the embryonic testis stimulates the development of male sexual organs. As an embryo develops, it acquires both wolffian and mullerian ducts.
Sexual organ develpment. As part of this. This means that very low concentrations of androgens or estrogens will negatively feed back onto the hypothalamus and pituitary, keeping the production of gnrh, lh, and fsh low. Because females do not have a y chromosome, they do not have the. As a result of these two changes, the levels of lh and fsh slowly increase and lead to the enlargement and maturation of the gonads, which in turn leads to secretion of higher levels of sex hormones and the initiation of spermatogenesis and folliculogenesis. Not all tissues in the reproductive tract are bipotential. The development of the reproductive systems begins soon after fertilization of the egg, with primordial gonads beginning to develop approximately one month after conception.
Development of the sexual organs in the embryo and fetus
As an individual approaches puberty, two changes in sensitivity occur. Answer the question(s) below to see how well you understand the topics covered in the previous section. Testosterone produces a penis and a scrotum for the male embryo, while the lack of testosterone will lead to a clitoris, urethra, the rest of the vagina and the labia for the female.