There’s no definitive research on how many women seek sterilization only to be turned away, but I’ve spoken to and learned about many people who have experiences similar to mine. Catherine Pearson at HuffPost interviewed a woman who had to wait about five years between her first sterilization request at age 24 and the time she found a doctor willing to do it. The difficulties and stigma surrounding sterilization have even led to the creation of a Reddit forum of “childfree-friendly” providers who may be more open to performing the procedure.

Some of the barriers to elective sterilization — like the 30-day waiting period and minimum age of 21 required of Medicaid patients seeking the procedure — are well intentioned, meant to prevent the abuses and coercion that vulnerable populations have experienced throughout American history. As recently as 2010, California prisons were found to be sterilizing female inmates against their will.

But when it comes to women who make an informed decision to ask for sterilization, everything from age, marital status and previous number of pregnancies to a hospital’s religious affiliation or a doctor’s personal beliefs can be used as a reason to deny care. The American Congress of Obstetricians and Gynecologists makes these biases explicit in 2007: The procedure “may have important effects on individuals other than the patient,” such as the patient’s husband or partner (whose approval some doctors require). The unusual requirements some doctors impose — waiting periods, age restrictions and psychological evaluations — are similar to those that legislators opposed to abortion have enacted for women seeking to terminate their pregnancies.

Dr. Julie Chor, an assistant professor of obstetrics and gynecology at the University of Chicago, has written about structural and institutional barriers to sterilization. She told me that physicians may have “their own personal set of rules as to who it is or is not appropriate to perform a sterilization on.” She also noted that the possibility of regret, in addition to whether or not a patient is a good candidate for surgery and is well informed about nonpermanent long-term contraceptive options, is also a large part of a doctor’s decision whether or not to sterilize a woman.

As a result, the percentage of women of childbearing age who have been sterilized hovers around 18 percent, and this figure has declined since the early 2000s. Sterilization is most common among women who are married, 35 or older and have two or more children, but even these women can find it hard to obtain the procedure — in one study, less than half of pregnant women who requested sterilization hours or days after giving birth got it. And this is for a procedure covered by insurance; the Affordable Care Act requires all plans to cover it, except for the small number provided by employers with a religious exception.

Doctors ought to put aside their biases and learn to trust their patients. They should not fear malpractice lawsuits brought by patients who change their minds, as long as the requirements for informed consent were met. Such reversals on the part of patients aren’t even likely; some 80 percent of women under 30 who undergo elective sterilization do not regret the procedure.