Iron Deficiency During Pregnancy in Canada: Signs, Testing, Causes and Treatment
Iron deficiency during pregnancy deserves attention, but the solution isn't simply to take more iron. Symptoms such as fatigue and dizziness can have many causes. A better approach is to discuss concerns with your healthcare provider.
Iron Deficiency During Pregnancy in Canada: Signs, Testing, Causes and Treatment
Iron deficiency during pregnancy is common enough to deserve attention, but symptoms alone cannot tell you whether your iron levels are low.
Pregnancy changes the body's iron requirements, and some people enter pregnancy with low iron stores.
If you are experiencing unusual fatigue, weakness, dizziness or other symptoms, don't assume that iron deficiency is the cause. Your healthcare provider can determine whether blood testing is appropriate.
This guide explains the signs of low iron, how iron deficiency is evaluated, common causes and the role of prenatal vitamins and iron supplements.
What is iron deficiency?
Iron deficiency occurs when the body's iron stores are insufficient.
Iron is needed for several important functions, including the production of hemoglobin.
Hemoglobin is a protein in red blood cells that carries oxygen.
If iron deficiency becomes significant enough to reduce hemoglobin or red blood cell production, it can contribute to iron-deficiency anemia.
Iron deficiency and iron-deficiency anemia are related, but they are not the same condition.
Why can iron deficiency occur during pregnancy?
Pregnancy places additional demands on the body.
Iron is needed to support increased maternal blood volume and the developing pregnancy.
A person may also begin pregnancy with low iron stores.
Factors that can contribute to low iron include:
Low dietary iron intake
Previous iron deficiency
Heavy menstrual bleeding before pregnancy
Multiple pregnancies
Closely spaced pregnancies
Certain gastrointestinal conditions
Limited absorption of nutrients
Vegetarian or vegan diets
Other individual circumstances
Signs of low iron during pregnancy
Iron deficiency or anemia can sometimes be associated with:
Fatigue
Weakness
Dizziness
Headaches
Pale skin
Shortness of breath
Reduced exercise tolerance
Feeling unusually tired
However, many of these symptoms can also occur during a normal pregnancy or result from other conditions.
Symptoms alone cannot diagnose iron deficiency.
If you're concerned about low iron, speak with your healthcare provider.
Does low iron always cause pregnancy fatigue?
No.
Fatigue is common during pregnancy and can have many causes.
These may include:
Normal physiological changes
Sleep disruption
Nausea
Changes in activity
Stress
Other nutritional issues
Medical conditions
If fatigue is severe, persistent or unusual for you, discuss it with your healthcare provider rather than assuming you need more iron.
How is iron deficiency diagnosed during pregnancy?
Blood tests are used to assess iron status and anemia.
Depending on your circumstances, your healthcare provider may evaluate measures such as:
Hemoglobin
Ferritin
Red blood cell indices
Other blood-count measurements
Additional iron studies when appropriate
The specific tests and interpretation depend on your individual situation.
What is ferritin?
Ferritin is a protein that stores iron.
Blood ferritin levels can provide information about the body's iron stores.
A healthcare professional can interpret ferritin results in combination with your symptoms, medical history, and other laboratory findings.
A single number should not be interpreted in isolation.
What is anemia?
Anemia occurs when the blood does not have an adequate amount of healthy red blood cells or hemoglobin for the body's needs.
Iron deficiency is one possible cause of anemia.
Other types of anemia can have different causes.
That's why identifying the underlying cause matters.
Iron deficiency vs. iron-deficiency anemia
These terms are sometimes used interchangeably, but they describe different stages.
Iron deficiency
Iron stores are low.
Iron-deficiency anemia
Iron deficiency has progressed to the point where it contributes to anemia.
A person can therefore have low iron stores without necessarily having iron-deficiency anemia.
Can you have iron deficiency without symptoms?
Yes.
Some people with low iron stores may have few or no obvious symptoms.
This is one reason blood testing and prenatal care are important.
Don't wait until you feel extremely tired before discussing iron status with your healthcare provider.
Can you have low iron even if you take prenatal vitamins?
Yes.
A prenatal vitamin does not guarantee that every person will maintain adequate iron stores.
Your needs can vary depending on:
Starting iron stores
Diet
Pregnancy-related requirements
Absorption
Blood loss
The amount of iron in your prenatal
Individual health circumstances
If blood tests identify deficiency, your healthcare provider may recommend additional iron.
Prenatal vitamins and iron deficiency
Many prenatal vitamins contain iron.
This can help provide supplemental iron as part of a broader prenatal nutrition plan.
However, prenatal vitamins are not necessarily designed to treat diagnosed iron-deficiency anemia.
If your healthcare provider recommends therapeutic iron, follow those instructions rather than relying solely on your prenatal vitamin.
Pregnavit Original and iron
Pregnavit Original by Newnesscare is a prenatal vitamin and mineral formulation.
Newnesscare currently lists:
35 mg elemental iron
600 mcg L-methylfolate
Vitamin B12
Vitamin D
Vitamin C
Iodine
Zinc
Magnesium
Additional vitamins and minerals
The current product information recommends one capsule daily with the main meal and on a full stomach.
Always check the current product label before use.
Pregnavit Plus and iron
Pregnavit Plus is based on the Pregnavit prenatal vitamin and mineral formulation and adds an Omega-3component.
Newnesscare currently lists 300 mg DHA in that Omega-3 component.
If you're choosing Pregnavit Plus, check the current product label for the exact iron amount and complete formulation.
Does a prenatal vitamin treat iron deficiency?
Not necessarily.
A prenatal vitamin provides nutritional supplementation.
If iron deficiency or iron-deficiency anemia is diagnosed, the appropriate treatment depends on its severity and cause.
Your healthcare provider may recommend:
Dietary changes
Oral iron
A different iron formulation
Additional testing
Other treatment when appropriate
Follow professional guidance rather than increasing your iron dose independently.
Iron supplements during pregnancy
Iron supplements can provide more iron than a standard prenatal vitamin.
Different products contain different forms and amounts.
When comparing iron supplements, look for the amount of elemental iron.
This represents the actual iron supplied by the iron compound.
What is elemental iron?
Elemental iron is the amount of actual iron in an iron-containing supplement.
Labels may identify compounds such as:
Ferrous sulfate
Ferrous fumarate
Ferrous gluconate
The weight of the compound isn't necessarily the same as the amount of elemental iron.
For meaningful comparisons, look for the elemental iron amount.
Can iron supplements cause side effects?
Yes.
Possible side effects include:
Constipation
Nausea
Stomach discomfort
Dark stools
Some people tolerate one formulation better than another.
If side effects are difficult to manage, speak with your pharmacist or healthcare provider.
Don't stop medically recommended treatment without discussing it first.
Iron deficiency and constipation
Iron supplements can sometimes contribute to constipation.
Pregnancy itself can also affect bowel habits.
If constipation becomes significant after starting iron, ask your healthcare provider or pharmacist about possible adjustments.
Do not simply reduce or stop prescribed iron on your own.
Iron deficiency and nausea
Nausea is common during pregnancy.
Some iron supplements can also cause nausea or stomach discomfort.
If your iron supplement is difficult to tolerate, your healthcare provider may be able to suggest another formulation or schedule.
Can diet correct iron deficiency during pregnancy?
A healthy diet is important, but diet alone may not correct established iron deficiency or anemia.
Iron-rich foods can support nutritional intake.
However, if testing shows significant deficiency, your healthcare provider may recommend supplementation.
Iron-rich foods for pregnancy
Useful sources of iron include:
Animal sources
Beef
Poultry
Certain seafood
Plant sources
Lentils
Beans
Chickpeas
Tofu
Fortified cereals
Nuts
Seeds
Leafy green vegetables
A varied diet can provide both heme and non-heme iron.
Heme iron vs. non-heme iron
Heme iron
Found mainly in animal foods.
It is generally absorbed more efficiently.
Non-heme iron
Found in plant foods and fortified foods.
Its absorption can vary depending on the overall meal.
Vegetarians and vegans can obtain iron from plant sources, but careful dietary planning may be helpful.
Vitamin C and iron absorption
Vitamin C can improve absorption of non-heme iron.
Pairing plant-based iron sources with vitamin-C-rich foods can therefore be useful.
Examples include:
Lentils with tomatoes
Beans with bell peppers
Tofu with broccoli
Fortified cereal with strawberries
Foods and drinks that can affect iron absorption
Certain dietary components can affect iron absorption.
For example, calcium and compounds found in tea and coffee can interfere with the absorption of non-heme iron.
If you're taking a prescribed iron supplement, ask your pharmacist or healthcare provider about timing.
Iron deficiency during pregnancy and vegetarian diets
Vegetarian and vegan diets can provide iron, but plant-based iron is non-heme iron.
Good sources include:
Lentils
Beans
Chickpeas
Tofu
Tempeh
Fortified cereals
Pumpkin seeds
Nuts
Leafy greens
Combining these foods with vitamin-C-rich foods can support iron absorption.
If you're concerned about your iron status, consider discussing your diet with a registered dietitian or healthcare provider.
Iron deficiency during pregnancy and multiple babies
Pregnancy with twins or higher-order multiples has additional nutritional considerations.
Don't assume that you should simply take multiple prenatal vitamins.
Your healthcare team can recommend an appropriate nutritional and supplementation plan.
Iron deficiency after childbirth
Iron status can remain important after delivery.
Blood loss during childbirth can affect iron levels.
If you had anemia during pregnancy or significant blood loss during delivery, your healthcare provider may recommend follow-up testing or continued iron supplementation.
How to prevent iron deficiency during pregnancy
There isn't one strategy that works for everyone.
Helpful steps can include:
Eat iron-rich foods
Include a variety of animal or plant sources.
Include vitamin C
Pair plant-based iron sources with vitamin C-rich foods.
Take your prenatal as directed
Use your prenatal according to the product's directions.
Attend prenatal appointments
Follow recommended testing and monitoring.
Discuss symptoms
Tell your healthcare provider if you're experiencing unusual fatigue, dizziness, weakness or other concerns.
Review all supplements
Make sure your healthcare team knows about every supplement you're taking.
Should you take extra iron just in case?
Usually, no.
Taking more iron without knowing whether you need it can increase side effects and may not address the actual cause of your symptoms.
If you suspect low iron, testing and professional assessment are more useful than guessing.
How to choose a prenatal if you're concerned about iron
If iron is an important consideration, compare:
Elemental iron
Iron form
Folate
Vitamin B12
Vitamin D
Iodine
DHA
Serving size
Directions
Also consider whether you're taking separate iron or other supplements.
Best prenatal vitamins for low iron
There isn't one universal "best" prenatal for someone with low iron.
The appropriate product depends on the severity and cause of the deficiency.
A standard prenatal can provide nutritional support, but diagnosed iron deficiency may require individualized treatment.
If you're concerned about low iron, speak with your healthcare provider before choosing a high-ironproduct.
Frequently Asked Questions
What are the symptoms of iron deficiency during pregnancy?
Possible symptoms include fatigue, weakness, dizziness, headaches, pale skin and reduced exercise tolerance. These symptoms can have many causes.
How do I know if I have low iron during pregnancy?
Blood testing can assess iron status and anemia. Speak with your healthcare provider if you're concerned.
What is ferritin?
Ferritin is a protein that stores iron and can provide information about iron stores when measured in blood.
Can you have low iron without anemia?
Yes. Iron stores can be low before iron-deficiency anemia develops.
Can I have iron deficiency even if I take a prenatal?
Yes. Individual iron needs and absorption vary.
Does a prenatal vitamin treat anemia?
Not necessarily. Diagnosed anemia may require individualized treatment from a healthcare professional.
Does Pregnavit Original contain iron?
Yes. Newnesscare currently lists 35 mg elemental iron per capsule.
Does Pregnavit Plus contain iron?
Pregnavit Plus is based on the Pregnavit prenatal vitamin and mineral formulation. Check the current product label for the exact amount.
Can iron cause constipation?
Yes. Constipation is a possible side effect of iron supplementation.
Does vitamin C help iron absorption?
Vitamin C can improve absorption of non-heme iron.
Should I take iron on an empty stomach?
Iron may be absorbed differently depending on whether it is taken with food. However, taking iron without food can cause gastrointestinal discomfort for some people. Follow the directions for your specific product.
Can I take extra iron with my prenatal?
Only if it is appropriate for your individual needs. Check with your healthcare provider before adding iron.
Can diet alone correct iron deficiency?
Diet is important, but established iron deficiency may require supplementation.
What foods are high in iron during pregnancy?
Meat, poultry, legumes, tofu, fortified cereals, nuts, seeds and certain vegetables can contribute iron.
Can vegetarians get enough iron during pregnancy?
Yes, but careful planning may be important. Plant-based sources provide non-heme iron.
When should I ask my doctor about low iron?
Discuss persistent or unusual fatigue, weakness, dizziness, shortness of breath or other concerns with your healthcare provider.
Can iron deficiency continue after pregnancy?
Yes. Iron status can remain low after delivery, particularly if anemia or significant blood loss occurred.
A practical low-iron checklist
If you're concerned about iron deficiency:
1. Don't diagnose yourself from symptoms.
Fatigue alone doesn't prove low iron.
2. Ask about testing.
Your healthcare provider can determine whether blood tests are appropriate.
3. Review your prenatal.
Check its elemental iron amount.
4. Review your diet.
Include iron-rich foods.
5. Add vitamin C-rich foods.
This can support absorption of plant-based iron.
6. Review other supplements.
Avoid unnecessary duplication.
7. Follow treatment recommendations.
If deficiency is diagnosed, follow your healthcare provider's plan.
The bottom line
Iron deficiency during pregnancy deserves attention, but the solution isn't simply to take more iron.
Symptoms such as fatigue and dizziness can have many causes.
A better approach is to:
Discuss concerns with your healthcare provider
Use appropriate blood testing
Eat iron-rich foods
Take your prenatal as directed
Check elemental iron on supplement labels
Avoid unnecessary duplicate supplementation
Follow individualized treatment when deficiency is diagnosed
Newnesscare's Pregnavit Original currently provides 35 mg elemental iron together with L-methylfolateand other prenatal vitamins and minerals.
Pregnavit Plus combines the Pregnavit formulation with an Omega-3 component that currently provides 300 mg DHA.
[Explore Pregnavit Original]
[Explore Pregnavit Plus]
Important information
This article is intended for general educational purposes and does not replace medical advice, diagnosis or treatment.
If you are pregnant and believe you may have iron deficiency or anemia, speak with your doctor, midwife, pharmacist, or another qualified healthcare professional.
Do not use high-dose iron to self-treat suspected iron deficiency.
Always read the current product label and follow the recommended directions for use.