(Nature recognizes that sex and gender are not the same, and are neither fixed nor binary.)This is just nonsense, as many of those articles use the words sex and gender interchangeably. And sex certainly is binary.
For example, one article is on The gender gap in cystic fibrosis. If sex and gender are not the same, then it should be titled "the sex gap in cystic fibrosis". And the article is filled with statements treating sex as binary, and none about anyone ever changing sex.
A medical journal has published a proposal for converting our medical schools to anti-White propaganda machines. One of the three authors looks as if she could be White, but she is actually the Jewish daughter of a Yale law professor. They have a 7-point plan to insure that all medical students will be committed to leftist anti-White causes. The only alternative they mention is to try to re-education on race an colonialism.