A recent meta-analysis has confirmed that use of birth control pills slightly increases the risk of cervical cancer. But before you stop your pills, take a deep breath, relax and read further.
Because the risk is really small. How small? Well, if you live in a developed country (meaning you have access to Pap smears), use of the pill for 10 years increases your chance of having cervical cancer from 3.8 per 1,000 to 4.5 per 1,000.
Remember that the real cause of cervical cancer is not birth control pills. It’s infection with the Human Papilloma Virus (HPV).
But estrogen metabolites of the pill may make your DNA more susceptible to changes induced by the HPV virus. The pill can also make the glands of the cervix more exposed to infection by the HPV virus. The other big factor may be that women taking the pill may use condoms less frequently, thus making them more likely to get HPV.
The good news is that once you stop the pill, the increased risk of cervical cancer goes away. That means that when you get older and don’t need birth control, you won’t be paying the price for your decision to use pills when you needed them to prevent pregnancy.
Bottom line – limiting your number of sexual partners and getting pap smears regularly are the most important things you can do to prevent cervical cancer. There is also a vaccine to prevent HPV, but remember that it only protects against 2 of the 12 subtypes of HPV that cause cervical cancer, so it’s not a panacea.
And remember, the pill cuts the risk of ovarian cancer, a protective effect that lasts up to 20 years after you stop the pill. It also reduces your risks of endometrial cancer. And keeps your menstrual cycles shorter, lighter and less painful. Not to mention it prevents pregnancy.
A Gynecologist’s Perspective
I’ve been a practicing gynecologist for 20 years now. In that time, I can remember only 1 case of cervical cancer in my private practice, in a woman age 60 who was completely cured with a hysterectomy. (The cancer was so small they could not find it in the hysterectomy specimen because I had removed it all with my office biopsy.)
I recall many more cases of cervical cancer from my residency, most during my oncology rotation, and all in women who had not had pap smears in years. I remember vividly the woman who presented to the ER bleeding from a large cancer on her cervix. She had not seen a doctor since giving birth to the last of her 7 children, who was now 25 years old. I don’t think she ever took birth control pills.
On the other hand, I’ve lost count of the number of unplanned pregnancies that have occurred among my patients, and the number of my patients who have had abortions for an unwanted pregnancy.
Given this experience, I see no reason for woman to stop taking the birth control pills because of concerns about cervical cancer.
I can think of only one situation where I might tell a woman to stop the pill for this reason. That is the rare patient with recurrent cervical dysplasia and persistent HPV infection that does not clear. I had one such patient, and I changed her to the progesterone-only pill. She is doing well.