Getting Pregnant After Birth Control: 5 Nutrients the Contraceptive Pill is Depleting You Of

The pill: love it or hate it, it's something most women have experience with. In fact, about 90% of women in the UK taking contraception choose the pill as their form of birth control.

But of course, you're probably here because you are (or are thinking about) having a baby. So once you've decided you're ready to TTC–can you just stop the pill and get right to it?

Well, not quite. Of course, it will take a month (or a few) for your cycles to re-establish themselves, but there may be more to the picture. From a nutritional perspective, there are some important things to have on your radar.

Fertility dietitian Stefanie Valakas is joining us on the blog today to share her expert insight into what you need to know if you've ever been on the pill. Let's get right to it!

As it turns out, the pill can deplete women of essential nutrients, which means you may have some catching up to do before you start actively trying get pregnant after birth control.

But first: how does the Oral Contraceptive Pill Work?

For those of you who are not familiar, the pill works by taking a combined estrogen and progesterone pill 21 days in a row at the same time every day, and then 7 days of a sugar pill when you get your "period", or a withdrawal bleed. The blood that is shed is due to the removal of hormones rather than what would occur in a regular menstrual cycle.

The hormones help prevent ovulation (an egg being released) by suppressing the release of the hormones that trigger this process. The other way it works is to prevent sperm from getting past your cervix to the uterus and fallopian tubes by thickening your cervical mucus.

So basically: no egg release, no possibility of fertilization, and also the addition of a potential extra barrier for those swimmers to get up there!

Now that we know the basics of how the pill works, let's get to…

The nutrients the contraceptive pill is depleting you of:

Zinc

Zinc is an essential mineral that I have discussed many times before when it comes to both sperm and egg health, so it's obviously important for fertility health! Studies have shown that women who take the OCP have lower levels of zinc in their blood, which has been a long-standing research point since the 1960s and has continually been confirmed. It is thought the reason why is because of changes in the zinc absorption and losses meaning there may be a higher dietary need for zinc amongst women who take the OCP.

Key dietary sources of zinc are:

Oysters, crabs & other shellfish
Meat
Legumes & beans
Cashews & other nuts
Seeds
Eggs
Quinoa & other whole grains

Magnesium

Magnesium is an essential mineral important for the production of energy and helps with over 300 reactions in the body. It can help with muscle relaxation, sleep, and bone health too. Research has shown multiple times that magnesium in the blood can be reduced by oral contraceptive pills, and it is thought that the increased risk of blood clots on oral contraceptive pills is partially due to the change in the calcium to magnesium ratio.

Researchers have proposed that magnesium supplementation during the period of oral contraception should be considered (be sure to discuss this with your doctor before you start taking any new supplements).

Key dietary sources of magnesium include:

Green leafy veggies
Fruit (figs, avocado, banana, raspberries)
Nuts & seeds
Legumes
Other vegetables (peas, broccoli, cabbage, green beans, artichoke, asparagus, Brussel sprouts)
Seafood

Selenium

Selenium is one of those minerals that is really hard to know how much you're getting in your diet as it fluctuates based on the selenium content of the soil of where the produce you eat is grown. Selenium is important for helping antioxidants work better in the body, as well as a role in the function of the thyroid.

Studies have shown that the oral contraceptive pill may be interfering with selenium absorption in the body.

Key dietary sources of selenium:

Brazil nuts
Pork
Beef
Turkey
Chicken
Fish & shellfish

B vitamins

B vitamins are a complex made of B1, B2, B3, B5, B6, B7, B9, and B12 that are essential for our body to get enough of each and every day as they are water-soluble, meaning they are lost via our sweat and urine. B vitamins help with energy formation and also cell health as well as a wide variety of other functions.

Some of the B vitamins that may be lower when a woman is on the pill include:

Folic acid (vitamin B9) - obviously important for early pregnancy, so when transitioning off the pill and you're trying to conceive, it's really important you give yourself a few months of taking a prenatal supplement that contains folic acid to ensure you do not start off with a nutrient deficiency. Studies reveal that the pill may be impairing folate metabolism and studies from the 1960s have shown that women taking the pill have poorer folate status based on their bloodwork. Get amongst those leafy greens and fortified grain foods to boost your daily intake from food too!
Riboflavin (vitamin B2) - turns out women of reproductive age can be at risk of vitamin B2 deficiency, found in milk, eggs, lean meats, and the pill can be making this worse according to studies dating back to the 1970s. Bonus, getting enough riboflavin can help reduce the headache intensity, frequency, and duration - a common side effect of the pill!
Pyridoxine (vitamin B6) - a study from the 1960s showed that women taking a combination oral contraceptive pill had evidence of vitamin B6 deficiency and that was later confirmed on a large scale and a 2008 US study showed that 75% of women taking the pill had significantly reduced B6 intake. Key dietary sources are protein foods, bread, cereals, and veggies.
Vitamin B12 - a critical vitamin for cell division and repair, turns out women taking the pill have lower blood levels of vitamin B12 compared to non-pill taking women, it might work similarly to the folate metabolism disturbance.

Vitamin C

Vitamin C, another water-soluble nutrient, famous for its immune promoting benefits, is also an antioxidant critical for cell health and collagen formation for skin and gum health.

There may be some differences in the vitamin C status of women taking the pill, but eating plenty of fruit and veggies can easily overcome the risk of any kind of vitamin C deficiency which is rare with a healthy diet that contains an abundance of vitamin C!

So, what's the best way forward when it comes to eating well to prevent vitamin and mineral deficiencies when taking the pill? Speak to an Accredited Practising Dietitian with an interest in women's health to guide you on your way whether you're planning for a family soon or not for a while yet, it's important to get on top of it earlier rather than later.

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