However, the author of that study, Brigham Young University professor Alex Jensennoted in a press release at the time that whether or not favoritism affects children tends to depend on how that favoritism is shown. For example, Duchenne muscular dystrophy affects boys, but if Russian Courses Conducted fetus is not the at-risk sex, such tests are unnecessary. Myths of Gender, Revised Edition. The mesonephric system is the precursor to the male genitalia and the paramesonephric to the female reproductive system. Over the next five weeks, the fetus begins producing hormones that cause its sex organs to grow into either male or female organs. Further sex differentiation of the external genitalia occurs at pubertywhen androgen levels again become disparate.
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