A birth coach in England resigned from Doula U.K., an industry charity, after the group reprimanded her for asserting that only women can give birth.

Lynsey McCarthy-Calvert, 45, was the spokeswoman of Doula U.K. but has stepped down from the organization, according to the Daily Mail. McCarthy-Calvert accused the charity of abandoning her over criticism from a small number of transgender activists offended by her social media post.

“I am angry and sad,” McCarthy-Calvert said on Monday. “I was effectively ostracized for saying I am a woman and so are my clients.

“I have been very disappointed by Doula U.K.’s response. The leadership are paralyzed by not wanting to upset transgender rights activists,” McCarthy-Calvert continued. “They have fallen over themselves to acquiesce to their demands.”

A number of activists responded to McCarthy-Calvert’s post accusing the birth coach of making offensive statements toward transgender people. Some asserted that being a woman is not necessary to become pregnant and have a child.