Hmmm. Not sure if I can link the complete article or if it is against the rules. But in short...
Many who oppose transgender rights believe that gender is determined solely by biological sex. But, biological sex isn’t as straightforward as they likely think, and there is no one parameter that makes a person biologically male or female. In fact, many conditions make assigning a biological sex quite difficult.
Despite the complexities, biological sex is often discussed as if it were obvious how to assign male or female sex. In addition to today’s Supreme Court ruling, last Friday, Trump eliminated transgender individuals’ civil rights in health care and Roger Severino, the Director of the Office for Civil Rights at the Department of Health and Human Services said of the bill that “We're going back to the plain meaning of those terms [male and female], which is based on biological sex.” Earlier this month, Harry Potter author, J.K. Rowling, was labeled anti-trans for making a distinction between biological women and transgender women. And, in April, Idaho became the first state to require that athletes competing in girls’ and women’s sports be biologically female. None explained exactly how they would assign biological sex in ambiguous cases.
Rowlings comments were in response to an article which referred to, “the menstrual health and hygiene needs of girls, women and all people who menstruate.” She tweeted , “‘People who menstruate.’ I’m sure there used to be a word for those people. Someone help me out. Wumben? Wimpund? Woomud?’ After facing criticism for suggesting that transgender women were not women, Rowling followed up, “If sex isn’t real, the lived reality of women globally is erased.”
www.forbes.com/sites/kimelsesser/2020/06/15/the-myth-of-biological-sex/#62f8193076b9