In response to shifting ideas about gender, many of the remaining women’s colleges redefined themselves as an antidote to the sexism that feminists were increasingly identifying in society. Women’s colleges argued that they offered a unique environment where every student leader was a woman, where female role models were abundant, where professors were far more likely to be women and where the message of women’s empowerment pervaded academic and campus life. All that seemed to foster students’ confidence. Women’s colleges say their undergrads are more likely to major in fields traditionally dominated by men. Wellesley alumnae in particular are awarded more science and engineering doctorates than female graduates of any other liberal-arts college in the nation, according to government data. Its alums have become two secretaries of state; a groundbreaking string theorist; a NASA astronaut; and Korea’s first female ambassador.

As women’s colleges challenged the conventions of womanhood, they drew a disproportionate number of students who identified as lesbian or bisexual. Today a small but increasing number of students at those schools do not identify as women, raising the question of what it means to be a “women’s college.” Trans students are pushing their schools to play down the women-centric message. At Wellesley, Smith, Mount Holyoke and others, they and their many supporters have successfully lobbied to scrub all female references in student government constitutions, replacing them with gender-neutral language. At Wellesley, they have pressed administrators and fellow students to excise talk of sisterhood, arguing that that rhetoric, rather than being uplifting, excludes other gender minorities. At many schools, they have also taken leadership positions long filled by women: resident advisers on dorm floors, heads of student groups and members of college government. At Wellesley, one transmasculine student was a dorm president. At Mills College, a women’s school in California, even the president of student government identifies as male.

What’s a women’s college to do? Trans students point out that they’re doing exactly what these schools encourage: breaking gender barriers, fulfilling their deepest yearnings and forging ahead even when society tries to hold them back. But yielding to their request to dilute the focus on women would undercut the identity of a women’s college. While women in coed schools generally outpace men in enrollment and performance, the equation shifts after college: Recent female graduates working full time earn far less than their male counterparts, and more experienced women are often still shut out of corporate and political leadership — all of which prompts women’s-college advocates to conclude that a four-year, confidence-building workshop still has its place.

“Sisterhood is why I chose to go to Wellesley,” said a physics major who graduated recently and asked not to be identified for fear she’d be denounced for her opinion. “A women’s college is a place to celebrate being a woman, surrounded by women. I felt empowered by that every day. You come here thinking that every single leadership position will be held by a woman: every member of the student government, every newspaper editor, every head of the Economics Council, every head of the Society of Physics. That’s an incredible thing! This is what they advertise to students. But it’s no longer true. And if all that is no longer true, the intrinsic value of a women’s college no longer holds.”

A few schools have formulated responses to this dilemma, albeit very different ones. Hollins University, a small women’s college in Virginia, established a policy several years ago stating it would confer diplomas to only women. It also said that students who have surgery or begin hormone therapy to become men — or who legally take male names — will be “helped to transfer to another institution.” Mount Holyoke and Mills College, on the other hand, recently decided they will not only continue to welcome students who become trans men while at school but will also admit those who identify on their applications as trans men, noting that welcoming the former and not the latter seemed unjustifiably arbitrary.

But most women’s colleges, including Wellesley, consider only female applicants. Once individuals have enrolled and announced that they are trans, the schools, more or less, leave it to the students to work out how trans classmates fit into a women’s college. Two of those students hashed it out last fall after Kaden Mohamed, then a Wellesley senior who had been taking testosterone for seven months, watched a news program on WGBH-TV about the plummeting number of women’s colleges. One guest was Laura Bruno, another Wellesley senior. The other guest was the president of Regis College, a women’s school that went coed in 2007 to reverse its tanking enrollment. The interviewer asked Laura to describe her experience at an “all-female school” and to explain how that might be diminished “by having men there.” Laura answered, “We look around and we see only women, only people like us, leading every organization on campus, contributing to every class discussion.”