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4 Surprising Ways Birth Control Could Affect Your Future Fertility

Jolene Brighten, N.D.
Author: Medical reviewer:
November 21, 2019
Jolene Brighten, N.D.
Doctor of Naturopathic Medicine
By Jolene Brighten, N.D.
Doctor of Naturopathic Medicine
Dr. Jolene Brighten is a women’s health expert currently based in Portland, Oregon. She received her Doctorate of Naturopathic Medicine at the National University of Natural Medicine and is the best-selling author of Beyond the Pill.
Wendie Trubow, M.D., MBA
Medical review by
Wendie Trubow, M.D., MBA
Functional Medicine Gynecologist
Wendie Trubow is a functional medicine gynecologist with almost 10 years of training in the field. She received her M.D. from Tufts University.
November 21, 2019
Here at mbg, we're all about shining a light on complicated health issues that aren't adequately or thoroughly discussed elsewhere. A prime example: fertility struggles. The truth is, fertility struggles are an uncomfortable topic, and as a result, people don't talk about it. This leads to couples experiencing more anxiety, stress, and confusion than they ever should on their journey to starting a family—with women often bearing the brunt of the burden. So, as part of Fertility Awareness Week, we're shining the light on the surprising, lesser known contributors to the growing fertility problem in this country so we're all more informed and empowered.

As a naturopathic doctor who helps women balance their hormones, I see many women who struggle with hormonal imbalances and menstrual irregularities when they go off oral contraceptives. And today, more than ever before, one of the most common concerns among women on the pill (or who are thinking about starting it) is the long-term impact that it may have on their fertility.

Maybe you've heard it's a myth that birth control can negatively affect your future fertility. But while it's true there are no studies showing that it directly interferes with conception, we also don't have extensive research on the long-term impact of birth control on women's health. In fact, there's a lot we don't know about fertility in general, let alone the intricacies that may come with using hormonal birth control for a decade or longer!

What we do know: Hormonal birth control works by several mechanisms, including shutting down brain-ovarian communication to prevent ovulation, altering the cervical mucus, and thinning the endometrial (uterine) lining.

4 ways birth control may be affecting your fertility.

In my own clinical practice, I've had patients who had regular cycles, previous pregnancies, and no signs that fertility would be an issue before starting birth control, only to struggle with regular periods and fertility post-pill. And while we don't have studies to show that birth control will make you unable to conceive or affect your future fertility directly, there are some known issues with birth control that may contribute to difficulty conceiving or maintaining a pregnancy:

1.

Masking other health conditions.

Taking hormonal birth control for symptoms like irregular, absent, or abnormal periods in order to "regulate" your period does not address the root cause of the issue. While hormonal birth control can give you a predictable withdrawal bleed, this isn't a natural cycle-driven period and it's not fixing what's causing your period problems.

The underlying cause of these symptoms may very well be due to polycystic ovarian syndrome (PCOS), hypothalamic amenorrhea, thyroid disease, or other medical conditions that can lead to difficulty conceiving. This means that if you used birth control for symptom management, then you may find it difficult to get pregnant when you stop. Does this mean birth control causes fertility struggles? No, but it likely prolongs the time it will take women to address their health problems, potentially putting them behind the eight ball when they do eventually decide they want to get pregnant.

It's also important to note that there are women with a history of regular periods who report missing periods within six months of discontinuing hormonal birth control. This symptom has been termed post-pill amenorrhea1.

2.

Depleting antioxidants.

Almost 20% of women2 seeking treatment for fertility struggles show signs of advanced ovarian aging. Antioxidants protect our cells from free radicals and are crucial in ovarian health. How does birth control fit into this? The pill is associated with depletion of antioxidants3 like CoQ10, vitamin E, vitamin C, and selenium.

Several small studies4 have shown that women using the pill have lower levels of CoQ10, which can affect fertility. In fact, one study5 concluded that suboptimal CoQ10 levels can cause fertility problems due to the decrease in mitochondrial function, which in turn leads to age-associated egg deficits. As we age, the production of CoQ10 in the body declines and is one factor in the decrease in mitochondrial function in the ovaries. This means that the combination of birth control and the natural aging process can hinder your fertility.

If you're over 35, are a past or current smoker, have a family history of early menopause, or any condition that increases oxidative stress, then hormonal birth control is one more factor that could contribute to these issues by way of lowering antioxidant protection.

3.

Thinning the uterine lining.

The use of hormonal birth control for five years or more has been associated6 with thinner endometrial (uterine) lining in women undergoing fertility treatments, which could make it more difficult to have healthy implantation and healthy pregnancy. This area warrants further exploration, but the same mechanism that provides protection against endometrial cancer while on birth control may be the cause of this observed phenomenon. It's important to note that in this study the women were already undergoing fertility treatments, so there may be additional factors involved.

4.

Making it harder to find a "compatible" mate.

I want to be super clear that this is a theory only, but it is worth a mention. Several studies have shown that women on hormonal birth control select for mates with genes more similar to their own—in other words, they potentially select a partner that isn't the most compatible for baby making, which may contribute to difficulty conceiving when coming off of birth control. We don't know that this affects fertility definitively due to the lack of research, but it's definitely an area that warrants exploration.

When should you stop birth control if you want to get pregnant?

Real talk: If you're taking the pill to delay pregnancy, then waiting too long to go off can potentially thwart your baby-making efforts. While there have been studies7 showing no significant difference in the amount of time it takes to conceive after coming off the pill compared to other birth control methods, there have been other studies8 showing9 a delay in the return of ovulation and regular menstrual cycles.

As a naturopathic physician who helps optimize hormone health after birth control, I advise coming off of birth control a minimum of six months before trying to conceive, with two years being the ideal. This allows time for you to address potential issues masked by birth control, rebuild your nutrient stores, and prepare your body for pregnancy.

6 things you can do now to optimize fertility—even if you're still on the pill.

If you suspect you may want a baby in the future, the answer isn't to just quit birth control immediately or live in fear of using the pill. Instead, schedule an appointment with your doctor to have a conversation about your specific situation and concerns and what the best course of action for you is at this time in your life.

Wherever you are on your journey with the pill—whether you're still taking it or have recently stopped—you can begin to implement the following steps to improve your fertility now. It takes 90 days for the egg you ovulate to mature, so what you do today can help your eggs in future cycles.

1.

Unearth the root cause.

If you started hormonal birth control for symptoms such as heavy periods, irregular periods, painful periods, intense PMS symptoms, or acne, now is the time to work with your doctor to figure out why you had those symptoms and start addressing the underlying cause.

2.

Begin a quality prenatal vitamin.

While on birth control, nutrients such as folate, B12, B6, zinc, magnesium, and others are depleted. These are all important for fertility, a healthy pregnancy, and a developing baby. I advise my patients who are contemplating getting pregnant at any point in the future to take a prenatal while using hormonal birth control. Be sure to avoid prenatals with food dyes, hydrogenated fats, and folic acid (opt for folate or methylfolate instead).

3.

Consider a CoQ10 supplement.

Animal studies5 have shown delayed ovarian reserve depletion when supplementing with CoQ10. We know birth control depletes CoQ10, and this directly affects mitochondrial health. Supplementing with CoQ10 may support better egg quality and pregnancy outcomes.

4.

Nourish your ovaries.

Load up on more nutrient-dense leafy greens, which are an excellent source of folate, and antioxidant-rich foods like berries, artichokes, and nuts. Healthy fats from avocados and cold-water fish can boost egg health and help keep your ovaries young, too. Even better, make as many of these foods as you can organic since many pesticides are hormone disrupters that may negatively affect fertility. Consider adding royal jelly to your diet as well (it's actually great in smoothies!)—several animal studies have shown that eating this gelatinous substance produced by honey bees can increase egg growth, development, and ovarian hormone production.

5.

Don't skimp on sleep.

Melatonin is not only a sleep hormone but a key antioxidant in protecting your ovaries. Exposure to light at night (especially shortwave blue light from our tech devices) decreases melatonin production, so turning in at a reasonable hour is recommended. Or, at the very least, start wearing some blue-light-blocking amber glasses.

6.

If you're a smoker, quit.

Sounds obvious, but it's a must. Not only does smoking increase your risk of stroke while on the pill, but it also compromises your fertility. Years of data have shown that smoking can make it difficult to become pregnant and lead to early menopause.

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