Some patients wait until Dr. Jerome Chelliah snaps on his gloves to make the request. Others blurt it out as soon as he walks in the exam room.

“I’d rather see a female doctor,” they say.

Chelliah thinks he can be a sensitive obstetrician-gynecologist even though he’s a man. But he has no choice but to comply.

“I’ve been rejected many times over,” he said. ”As a person of color, I face discrimination in other ways, but it’s not so blatant.… People have no problem saying they don’t want you.”

Chelliah is in a field of medicine where all the patients are female, and it’s more possible than ever for them to demand female doctors.

In 1970, 7 percent of gynecologists were women. Now 59 percent are.

Some men fear the falling number of male OB-GYNs could eventually lead to them being excluded from the specialty. They believe this is not only unfair, but also has subtle ramifications that go beyond patients’ comfort on the examination table.

It’s a perspective that garners little sympathy among women who had to fight for entrance into the male-dominated world of medicine.

“Nobody was worried at all that there weren’t enough women in OB” in the 1970s, said Dr. Barbara Levy, an OB-GYN who trained then. “Nobody paid any attention to us.”

The debate about male OB-GYNs taking place in universities and doctors’ offices across the country has stoked concern and resentment among men and women, creating the ultimate collision of medicine and gender politics.

Chelliah, 28, became an OB-GYN because he wanted to get to know his patients, not just their medical problems.

OB-GYNs often treat the same women for decades, helping them pick a birth control method and cope with menopause. They care for mothers through pregnancy and share in the joy of new families.

“We have a front-row seat to life that no one else has,” said Chelliah, who is completing OB-GYN residency training at Kaiser Permanente in Santa Clara, Calif.

Yet the job can feel cruel. Chelliah recently noticed a sign on a patient room with a picture of a baby’s foot. Above it, “Female providers only.” He kept walking.

Patients can legally discriminate by sex, race or any other factor when choosing a physician, and some women feel more comfortable talking about intimate health topics with women.

Brooke Hamel, 19, recently went to get an intrauterine device inserted by a doctor recommended by her sister. She quickly started crying.

“He touched me and I immediately lost it,” said Hamel, who lives in Yorktown, Va. “As soon as I had to spread my legs, I was in a really vulnerable place, and I did not want to be in that position with a male.”

Male medical students say OB-GYN patients at universities often ask that they not be in the exam room. While female students are awed by helping deliver their first baby, men can miss out.

“It sends a horrible message to men who might have a nascent interest in OB-GYN that’s promptly quashed,” said Dr. Carl Smith, head of the OB-GYN department at the University of Nebraska Medical Center.

Men are now less likely than ever to try to become OB-GYNs. Only about 17 percent of current OB-GYN residents are men. Smith and others say that if their numbers keep dropping, it could weaken the field overall.

Dr. Reshma Jagsi, who studies gender issues in medicine at the University of Michigan, said a group of people with varied perspectives can better solve complex questions and make advances in a field. Men and women can offer important contributions to OB-GYN, she said.

“I really do believe that diversity improves the quality of care,” said Jagsi.

Dr. Saketh Guntupalli, a gynecological oncologist at the University of Colorado, raised the stakes. “If you exclude 50 percent of people from anything, think about how much you’ve lost,” he said. “You might lose the next person who’s going to find a cure for cancer.”

These concerns appear to have given men pursuing OB-GYN an advantage. Medical school advisors told some that they wouldn’t need to apply to as many residency programs as women with equivalent test scores, male students said.

If deciding between an equally qualified male and female candidate for a residency class that otherwise would have only women, program directors may favor the man, said Dr. Todd Jenkins, an OB-GYN at the University of Alabama at Birmingham.

“We find our faculty, our residents work better when we have a little mix,” he said.

Many women — patients and doctors alike — bristled at the idea that the field needs men.

In the 1970s, women struggled to get into medical school and to find doctors who wouldn’t judge their sex lives, said Wendy Kline, a history of medicine professor at Purdue University. Activists viewed the male-run healthcare system as a gear of the patriarchy, she said.

Now 82 percent of residents training to be OB-GYNs are women. The proportion of female gynecologists in practice is expected to hit two-thirds by 2025.

Carol Weisman, a Penn State public health and OB-GYN professor, lauded women’s success in the field and balked at efforts to recruit men. She pointed out that OB-GYN remains one of the hardest specialties to break into each year.

“It seems to me that there’s some residual sexism in that view, that we need men to be sure that we’re training the best possible people for our specialty,” she said.

Outside of OB-GYN, fewer than a third of doctors are women. Men dominate 37 of the 42 other medical specialties.

When Pari Ghodsi, an OB-GYN in Los Angeles, wears her scrubs outside the hospital, people ask, “Are you a nurse?”

“That doesn’t happen the other way around: If you see a man in scrubs, you assume he’s a doctor,” said Ghodsi, 36.

Nationally, there’s no effort to draw more men to OB-GYN by the American College of Obstetricians and Gynecologists, the OB-GYN professional organization, according to Levy, its vice president for health policy.

“There are no right numbers or wrong numbers for what our specialty looks like,” she said.

Levy and others believe the shift is largely driven by patients seeking doctors who seem more like peers than white coats. Younger patients in particular say they can trust someone they know has been vulnerable in the same way.

“Even a female gynecologist has been to a gynecologist,” said Taylor Ortega, 28, a comedian in New York City. “There’s a lot we know about each other without knowing each other.”

Some patients prefer male OB-GYNs — 8 percent, according to a recent review of 23 studies. Those women say they’re gentler and better listeners and take their concerns more seriously, perhaps to overcome stereotypes.

Even more women — 41 percent in the same study — have no gender preference, a fact that’s popular with doctors who say the desire for female physicians has been overstated.

“We have to do a better job recruiting and dispelling some of the rumors and myths,” said Guntupalli, 39, of the University of Colorado. “First and foremost, women want a good doctor.”

Daniel Spinosa, a medical student at UC San Diego, was told repeatedly that his gender wouldn’t stop him from being a skilled OB-GYN.

Spinosa, 30, left a job on Wall Street because he wanted a career in which he could more tangibly help people. He thought he might want to be an oncologist.

But he said that while treating OB-GYN patients in medical school he learned he could develop meaningful relationships with them.

Older male OB-GYNs told him he could be happy with the career. OB-GYNs say they like that the field is dedicated to life, not death, and enjoy the unique mix of clinical work and surgery.

Spinosa, who will begin an OB-GYN training program this year, says he eventually wants to subspecialize in cancers. Male OB-GYNs are more likely to subspecialize, in large part because patients don’t tend to be as picky about gender when they have a problem they need solved.

Spinosa, however, believes he could attract patients regardless. It’s like his mentors told him, he said: “If you provide good care, your patients will love you, and that’s true in any field.”