In the 19th century it was common for women to adopt male pen names to ease the path to publishing. "George Eliot" was really Mary Ann Evans.
In the 20th and 21st centuries, women have managed to sell millions of books without hiding their gender.
I just looked at nine NYTimes bestsellers lists, and in almost every category authors with female names had two out of the top five positions. That's nothing to be ashamed of; and it may be that if I examined bigger lists and lists that spanned more time, that women would have higher percentages.
Wikipedia says (and you don't have to believe it) that Agatha Christie and William Shakespeare are tied for first place in the number of fiction books sold (between 2 and 4 billion each).
Nevertheless, some female writers hide behind gender-neutral identities. Joanne (J. K.) Rowling has apparently sold more than 400 million books. On this forum, we have J. Lang Wood, DJ Young and DC Stanfa. My friend Christy Pinheiro writes as C. Pinheiro.
So ladies, what's the story? Do you still think that agents, publishers and readers will reject you if they know you don't have the X chromosome like us guys?