Early Pregnancy Support: First Trimester Guide | My Fertility Labs
From understanding early pregnancy hormones to nutrition, managing symptoms, and knowing when to seek support, here's what the research says about taking care of yourself in the first weeks of pregnancy.
Seeing a positive pregnancy test can bring a rush of emotions: excitement, happiness, disbelief, and sometimes a little uncertainty. After months of tracking cycles and trying to conceive, you may suddenly find yourself asking a whole new set of questions.
What should I do now? Should I have my hormones checked? Am I eating the right foods? Are these symptoms normal? Is there anything I can do to support a healthy pregnancy?
And if you've experienced a previous pregnancy loss, those first few weeks may come with additional worry. At My Fertility Labs, we believe that reproductive health care doesn't stop when you become pregnant.
The first trimester is a time of extraordinary development. It's also an important opportunity to review your health, support your nutritional needs, manage relevant medical conditions, and connect with appropriate prenatal care.
Our clinicians are trained in restorative reproductive medicine, an approach that emphasizes understanding reproductive function and identifying and treating underlying health concerns.
Whether this is your first pregnancy or you're approaching pregnancy after a difficult experience, here's what you should know about caring for yourself and your developing baby.
1. What happens during the first trimester?
Pregnancy is measured from the first day of your last menstrual period, which means that by the time you receive a positive pregnancy test, you're often already around four weeks pregnant.
The first trimester lasts until the end of week 13.
Although you may not look or feel pregnant yet, significant changes are already happening.
During these early weeks, the foundations of your baby's brain, spinal cord, heart, and other organs begin to develop.
Your body is also adapting through changes in hormones, blood circulation, metabolism, and nutrient requirements.
The hormones supporting early pregnancy
Several hormones play important roles during this time.
Human chorionic gonadotropin (hCG): This is the hormone detected by pregnancy tests. After implantation, hCG production increases and helps support the corpus luteum, which produces progesterone in early pregnancy.
Progesterone: This hormone helps maintain the uterine lining and support the environment necessary for early pregnancy. Initially, it is produced mainly by the corpus luteum, with the placenta gradually taking over progesterone production as pregnancy progresses.
Estrogen: Estrogen levels increase during pregnancy and contribute to changes in the uterus, circulation, and other tissues.
These hormonal changes are a normal part of pregnancy, but people can experience them differently. Some notice significant nausea, breast tenderness, and fatigue. Others experience relatively few symptoms.
Having fewer pregnancy symptoms does not automatically mean something is wrong.
Likewise, having strong symptoms doesn't guarantee that a pregnancy is progressing normally. Understanding this distinction can help reduce some of the anxiety that comes with closely monitoring every physical change.
2. You've had a positive pregnancy test. What should you do next?
One of the best first steps is to arrange prenatal care. Contact your family doctor, midwife, or other appropriate maternity care provider to let them know you're pregnant and arrange your first appointment. Your prenatal team can help establish your estimated due date, review your medical history, arrange routine investigations, and discuss your individual health needs. [1]
What happens at your first prenatal appointment?
Your initial prenatal assessment may include:
Reviewing your medical history and previous pregnancies
Discussing medications, supplements, and existing health conditions
Checking blood pressure and other relevant health measurements
Arranging routine blood and urine testing
Discussing genetic screening options
Planning ultrasound examinations when appropriate
Common prenatal blood tests include a complete blood count, blood group and Rh status, an antibody screen, and screening for certain infections.
Additional testing may be recommended based on your medical history. If you've experienced previous pregnancy complications or have an existing condition that could affect your pregnancy, let your provider know early.
It's also worth mentioning any fertility medications or hormonal treatments you're currently taking. If you're already working with a fertility clinic, follow its instructions about early pregnancy monitoring and medications. My Fertility labs can provide complementary reproductive health support, but it doesn't replace routine prenatal appointments, obstetric care, or pregnancy ultrasound assessments.
3. Why hormone health continues to matter after conception
Much of the conversation about fertility hormones focuses on ovulation and getting pregnant.
But hormonal health remains important after conception.
Some existing endocrine conditions require closer attention during pregnancy because your body's needs change.
Thyroid health is especially important
Thyroid hormones are essential for normal maternal metabolism and fetal development, particularly during early pregnancy when the developing baby depends on maternal thyroid hormone.
For people with diagnosed hypothyroidism, thyroid hormone requirements often increase during pregnancy. The American Thyroid Association's 2026 clinical guideline recommends that people already treated with levothyroxine receive prompt assessment and pregnancy-appropriate management because medication requirements frequently change. [2]
This is a meaningful example of how identifying and treating an underlying hormonal condition can support pregnancy health.
If you have a history of hypothyroidism, thyroid surgery, or another significant thyroid disorder, contact your prescribing clinician promptly after a positive pregnancy test.
Not everyone needs repeated thyroid testing, however. Testing and treatment should be based on clinical indications rather than assuming all hormone levels need to be optimized to an arbitrary target.
Other conditions may need continued attention
Depending on your medical history, your care team may also consider:
Diabetes or insulin-related metabolic concerns: Good glucose management is particularly important in people with pre-existing diabetes because elevated blood glucose around conception and early pregnancy can increase the risk of complications.
PCOS: People with PCOS may benefit from individualized assessment of metabolic risk factors, including glucose regulation and blood pressure, during pregnancy planning and prenatal care.
Other endocrine or chronic medical conditions: Some conditions, and the medications used to treat them, require adjustment or monitoring as pregnancy progresses.
At My Fertility Labs, our licensed clinicians can assess relevant hormonal and reproductive concerns, provide appropriate treatment and follow-up within their scope, and work alongside your pregnancy care providers. Our goal is to help ensure that meaningful health concerns are identified and addressed—not to suggest that every pregnancy requires extensive hormone testing.
4. Nutrition in early pregnancy: Supporting your body and your baby's development
Nutrition is one of the most important areas of preconception and early pregnancy care.
During pregnancy, your body needs additional nutrients to support an expanding blood supply, changes in maternal tissues, and fetal growth and development.
According to Health Canada's updated 2026 guidance, several nutrients deserve particular attention during pregnancy, including folate, iron, choline, vitamin B6, and vitamin D. [3]
Folate: Important from the very beginning
Folate is essential for early development of the neural tube, which eventually forms the brain and spinal cord. Adequate folic acid intake before conception and during early pregnancy significantly reduces the risk of neural tube defects.
Health Canada recommends a daily multivitamin containing 400 micrograms (0.4 mg) of folic acid for people who are pregnant or could become pregnant. [4]
Ideally, supplementation begins before conception. If you've just discovered you're pregnant and haven't started taking folic acid, begin as soon as possible. Some people require higher doses based on medical history, which should be determined with a healthcare professional.
Iron: Supporting blood and oxygen delivery
Iron is essential for producing hemoglobin, the protein that carries oxygen in red blood cells.
During pregnancy, your blood volume increases, and your iron requirements rise. Inadequate iron intake can contribute to iron deficiency and anemia.
Canadian guidance recommends that prenatal multivitamins generally contain 16–20 mg of iron. [3] Additional iron supplementation may be needed when iron deficiency is diagnosed, but taking large amounts without clinical guidance isn't recommended.
Iodine: Supporting thyroid function and brain development
Iodine is required for thyroid hormone production.
Because thyroid hormones are important for fetal brain and nervous system development, adequate iodine intake during pregnancy matters.
Food sources include dairy products, fish, eggs, and iodized salt.
People who avoid certain food groups may need additional dietary assessment.
However, excessive iodine supplementation can also affect thyroid function, so more isn't necessarily better.
Choline, vitamin D, and vitamin B12
Choline contributes to fetal brain and nervous system development.
Vitamin D supports bone health and calcium metabolism.
Vitamin B12 is necessary for healthy neurological development and red blood cell production.
People following vegan or highly restrictive diets, or those with certain medical conditions affecting nutrient absorption, may require additional assessment.
Do you need a perfect pregnancy diet?
Absolutely not. The goal is to eat a varied, nutritious diet that supports your individual needs.
That may include vegetables, fruit, whole grains, protein-rich foods, healthy fats, and appropriate prenatal supplementation.
There's no single food or supplement combination that guarantees a healthy pregnancy.
At My Fertility Labs, our holistic nutrition professionals can provide individualized guidance based on dietary preferences, symptoms, health history, and relevant clinical findings.
For some patients, this means reviewing nutritional adequacy or addressing an identified deficiency.
For others, it may simply mean finding practical ways to eat well while managing nausea, fatigue, or food aversions.
Early pregnancy nutrition should be supportive and sustainable—not another source of pressure.
5. Managing common early pregnancy symptoms
Early pregnancy often comes with physical changes that can be surprising. Understanding what's common, and knowing when to ask for help, can make the first trimester easier to navigate.
Nausea and food aversions
Nausea and vomiting are common in early pregnancy. Despite the name morning sickness, symptoms can occur at any time of day. For many people, nausea begins during the first several weeks and improves as the pregnancy progresses.
Research-supported strategies include eating smaller, more frequent meals, avoiding bothersome smells, and trying foods that are easier to tolerate. [5] Vitamin B6, sometimes combined with doxylamine, is an established treatment option when appropriate.
If nausea is affecting your ability to eat, drink, work, or manage daily activities, speak with your prenatal care provider. You don't have to endure significant symptoms without treatment.
Fatigue
Feeling unusually tired is common during the first trimester. Hormonal changes and the physical demands of early pregnancy can contribute to fatigue. Rest when needed, maintain regular meals, stay hydrated, and ask for help if you're struggling.
Severe or persistent fatigue, especially when accompanied by dizziness, shortness of breath, or other symptoms, may warrant assessment for conditions such as anemia.
Breast tenderness and bloating
Breast tenderness, digestive changes, and bloating are common as hormone levels rise. These symptoms may come and go. Their intensity isn't a reliable way to judge pregnancy health.
Mild cramping
Some people experience mild abdominal or pelvic cramping in early pregnancy. However, pain should not automatically be attributed to normal pregnancy changes.
Persistent, worsening, severe, or one-sided pain requires medical assessment. If pain occurs with dizziness, fainting, shoulder-tip pain, or significant bleeding, seek emergency care because these can be signs of an ectopic pregnancy or another urgent complication. [6]
6. Everyday habits that support a healthy pregnancy
You don't need to completely change your lifestyle overnight when you become pregnant.
A few evidence-based habits can make a meaningful contribution to maternal health.
Continue appropriate physical activity
For most people with uncomplicated pregnancies, low to moderate-intensity exercise is safe and beneficial. The Canadian Guideline for Physical Activity throughout Pregnancy recommends at least 150 minutes of moderate-intensity activity per week for pregnant people without contraindications. [7]
Walking, swimming, and other comfortable forms of movement can be good options.
Physical activity may help improve fitness and reduce the risk of certain pregnancy complications.
If you have a high-risk pregnancy, significant symptoms, or a medical condition, discuss appropriate activity with your prenatal provider.
Review medications and supplements
Pregnancy can change which medications are appropriate and how they should be managed. This includes prescription medications, over-the-counter products, herbal remedies, and fertility-related supplements. Some medications are essential to continue during pregnancy, while others require adjustment.
Don't stop prescribed treatment without consulting your healthcare professional.
If you conceived through IVF and are using progesterone or other prescribed medications, follow your fertility clinic's instructions.
Avoid alcohol, smoking, and cannabis
Canadian public health guidance recommends avoiding alcohol during pregnancy because no safe amount has been established. Tobacco and cannabis exposure can also pose risks to maternal and fetal health. [8] If you're using any of these substances, your healthcare provider can help you access support.
Be mindful of caffeine and food safety
Health Canada recommends limiting caffeine to no more than 300 mg daily during pregnancy. [9]
Pregnancy also increases vulnerability to certain foodborne infections, making safe food preparation and avoiding higher-risk foods particularly important.
You can review current Canadian pregnancy food safety guidance with your prenatal provider or nutrition professional.
7. Pregnancy after loss: Moving forward with care and support
For someone who has previously experienced a miscarriage, seeing another positive pregnancy test can bring a complicated mix of hope and worry. There is an important and encouraging message from the research:
Most people who experience an early miscarriage go on to have a successful pregnancy. [10]
A previous pregnancy loss does not automatically mean that the same outcome will happen again.
Can underlying conditions sometimes be treated?
Yes, although not every miscarriage has an identifiable or preventable cause. Many early miscarriages result from chromosomal abnormalities in the developing embryo rather than a treatable health condition. However, some patients have underlying conditions that may be relevant to future pregnancy outcomes.
The American Society for Reproductive Medicine's 2026 guideline on recurrent pregnancy loss recommends considering a targeted investigation after two or more pregnancy losses. [11] Depending on the circumstances, assessment may include uterine anatomy, clinically indicated thyroid testing, metabolic health, genetic factors, or evaluation for antiphospholipid syndrome.
Some identified conditions have established treatments. For example, appropriately selected patients with antiphospholipid syndrome may benefit from a specialist-directed treatment plan involving low-dose aspirin and heparin. Treatment of overt thyroid disease or uncontrolled diabetes is also important when these conditions are present.
But a history of miscarriage doesn't mean everyone needs extensive hormone panels, immune testing, aspirin, or other medications. An individualized approach matters.
What about progesterone supplementation?
This is a particularly common question. Progesterone plays a necessary role in maintaining pregnancy, but giving additional progesterone isn't beneficial for everyone.
A large randomized trial involving more than 4,000 women with early pregnancy bleeding found no statistically significant improvement in live births from progesterone treatment across the entire study population. [12] However, subgroup analyses suggested a benefit among women with a previous miscarriage who were experiencing bleeding in their current pregnancy.
Based on this evidence, the UK's National Institute for Health and Care Excellence (NICE) recommends vaginal micronized progesterone for certain patients with early pregnancy bleeding, a history of miscarriage, and an ultrasound-confirmed intrauterine pregnancy. [13] ASRM's 2026 recurrent pregnancy loss guideline also recognizes that progesterone may be considered in selected circumstances, while emphasizing that evidence does not support routine supplementation for everyone. [11]
The takeaway: Progesterone treatment may have a role in specific situations, but decisions should be based on clinical history, symptoms, and appropriate pregnancy assessment—not a single blood progesterone result alone.
Support matters, too
Pregnancy after loss can involve uncertainty even when medical assessments are reassuring. Some people appreciate extra opportunities to discuss symptoms, ask questions, and receive emotional support.
At My Fertility Labs, our care team recognizes the importance of both physical and emotional wellbeing. We also partner with the Pregnancy & Infant Loss Support Centre (PILSC), which provides support for pregnancy and infant loss, fertility challenges, and pregnancy after loss.
You deserve compassionate care that acknowledges your previous experience while making room for hope in your current pregnancy.
8. Do you need additional bloodwork or monitoring in early pregnancy?
Not necessarily. One of the most important principles of evidence-based pregnancy care is choosing tests that answer a meaningful clinical question.
For example, blood hCG testing may be useful when pregnancy location or progression is uncertain, particularly when symptoms require investigation. Ultrasound may be recommended to confirm pregnancy location, establish gestational age, or investigate concerning symptoms. But routine serial hormone testing isn't necessary for every healthy early pregnancy. And repeatedly measuring progesterone or hCG does not, on its own, prevent pregnancy complications.
Your healthcare provider can help determine which tests are appropriate based on your symptoms, history, and stage of pregnancy.
At My Fertility Labs, our clinicians can review relevant reproductive health concerns and provide appropriate assessment or follow-up within their scope. If you require specialized pregnancy imaging or obstetric monitoring, we can support communication with the professionals responsible for that care.
The goal is useful information and appropriate treatment—not testing for the sake of testing.
9. Common questions about early pregnancy
"I don't feel pregnant. Should I be worried?"
Not necessarily. Early pregnancy symptoms vary considerably. Some people experience strong nausea and fatigue, while others have few noticeable changes.
A lack of symptoms doesn't automatically indicate a problem. If you're worried because of bleeding, pain, or a significant change accompanied by other concerning symptoms, contact your pregnancy care provider.
"Do I need an ultrasound as soon as I have a positive test?"
Not always. The timing of ultrasound depends on gestational age, symptoms, medical history, and whether pregnancy location or viability needs to be assessed. An ultrasound performed very early may be inconclusive simply because the pregnancy is too early to visualize clearly.
Your healthcare provider can help determine appropriate timing and whether follow-up imaging is needed.
"Can I keep exercising during pregnancy?"
For most people with uncomplicated pregnancies, yes. Moderate physical activity is generally safe and does not increase miscarriage risk. Some activities may need to be modified depending on your health, symptoms, and pregnancy circumstances. [7]
"Should I continue the supplements I was taking while trying to conceive?"
Review them with your healthcare provider. A pregnancy-appropriate prenatal multivitamin is generally recommended, but some fertility supplements, herbal products, or high-dose vitamins may not be appropriate during pregnancy.
More supplementation does not always mean better support.
"I have PCOS or a thyroid condition. Do I need additional care?"
You may benefit from individualized monitoring depending on your diagnosis.
For example, people taking thyroid replacement medication often need reassessment during early pregnancy because thyroid hormone requirements can increase.
Patients with PCOS may need attention to metabolic risk factors and other relevant health concerns.
Your clinician can help determine whether additional testing or treatment is indicated.
"I've experienced a miscarriage before. Is there anything I should do differently?"
It's worth discussing your pregnancy history with your healthcare provider early.
For some people, targeted investigation or treatment may be appropriate based on previous losses, diagnosed conditions, or current symptoms. For others, the most appropriate care involves routine prenatal assessment together with additional emotional support and individualized follow-up.
Most importantly, a previous miscarriage doesn't mean that you did something wrong or that another loss is inevitable.
"When should I seek medical attention in early pregnancy?"
Contact a healthcare professional promptly if you experience vaginal bleeding, persistent or worsening abdominal pain, or significant vomiting that makes it difficult to keep fluids down.
Seek emergency care for severe abdominal pain, shoulder-tip pain, fainting, marked dizziness, or heavy bleeding. These symptoms can occasionally indicate serious conditions, including ectopic pregnancy, and shouldn't be managed through routine fertility follow-up alone. [6]
10. How My Fertility Labs supports you during early pregnancy
At My Fertility Labs, we believe that understanding your reproductive health is valuable before, during, and after conception. Our approach considers your individual medical history, reproductive health, nutrition, and emotional wellbeing.
Hormonal and reproductive health support
Our clinicians are trained in restorative reproductive medicine and can assess relevant hormonal or reproductive concerns, provide appropriate treatment and monitoring within their professional scope, and collaborate with other healthcare providers when necessary.
This can be particularly valuable for patients with existing hormonal or metabolic conditions that require attention around the time of conception or in early pregnancy.
Personalized nutrition support
Our holistic nutrition professionals provide individualized guidance to help you meet your nutritional needs and navigate the changing demands of pregnancy. Whether you're managing nausea, have dietary restrictions, want to review prenatal supplements, or have a diagnosed nutritional concern, personalized support can help you make informed decisions.
Emotional support and education
We recognize that early pregnancy can bring plenty of questions, and having access to a compassionate team can make a difference. For patients navigating pregnancy after loss, we can also connect you with appropriate emotional and peer-support resources.
Care that complements your prenatal team
My Fertility Labs is not a replacement for your family doctor, midwife, obstetrician, or fertility specialist. We work alongside other healthcare professionals, providing complementary reproductive health, nutrition, and emotional support while your prenatal provider oversees pregnancy-specific medical care.
Our goal is to help you feel informed, supported, and confident that your broader health needs are being considered.
You deserve support from the very beginning
The first trimester is an important time for both you and your developing baby. It's a time of major changes, new questions, and exciting possibilities.
Whether you're experiencing pregnancy for the first time, have conceived after fertility treatment, or are navigating pregnancy after a previous loss, your care should reflect your unique circumstances.
At My Fertility Labs, we believe that early pregnancy support is about more than monitoring symptoms or reviewing test results. It's about understanding your health, managing meaningful medical concerns, supporting good nutrition, and making sure you have access to compassionate, individualized care.
You don't need to navigate every question on your own.
From preparing for pregnancy to supporting your health in the earliest weeks, My Fertility Labs is here to walk alongside you.
Looking for additional support during early pregnancy?
Our team offers reproductive health consultations, personalized nutrition support, and ongoing care for patients navigating fertility and pregnancy.
References
Public Health Agency of Canada. (2020). Family-centred maternity and newborn care: National guidelines—Chapter 3: Care during pregnancy. https://www.canada.ca/en/public-health/services/publications/healthy-living/maternity-newborn-care-guidelines-chapter-3.html
Korevaar, T. I. M., et al. (2026). American Thyroid Association 2026 guidelines for thyroid disease in preconception, pregnancy, and postpartum. Thyroid. https://doi.org/10.1177/10507256261445624
Health Canada. (2026). Applying Canada's Dietary Guidelines: Nutrition considerations during pregnancy and to support breastfeeding. https://www.canada.ca/en/health-canada/services/food-guide/explore/dietary-guidelines/applying/advice-nutrition-different-life-stages/considerations-pregnancy-support-breastfeeding.html
Public Health Agency of Canada. (2025). Folic acid, healthy pregnancy and neural tube defect prevention. https://www.canada.ca/en/public-health/services/pregnancy/folic-acid.html
American College of Obstetricians and Gynecologists. (2025). Morning sickness: Nausea and vomiting of pregnancy. https://www.acog.org/womens-health/faqs/morning-sickness-nausea-and-vomiting-of-pregnancy
National Health Service. (n.d.). Ectopic pregnancy: Symptoms. https://www.nhs.uk/conditions/ectopic-pregnancy/symptoms/
Mottola, M. F., et al. (2018). 2019 Canadian guideline for physical activity throughout pregnancy. British Journal of Sports Medicine, 52(21), 1339–1346. https://doi.org/10.1136/bjsports-2018-100056
Public Health Agency of Canada. (n.d.). Your guide to a healthy pregnancy. https://www.canada.ca/en/public-health/services/health-promotion/healthy-pregnancy/healthy-pregnancy-guide.html
Health Canada. (2025). Caffeine in foods. https://www.canada.ca/en/health-canada/services/food-nutrition/food-safety/food-additives/caffeine-foods.html
American College of Obstetricians and Gynecologists. (n.d.). Early pregnancy loss. https://www.acog.org/womens-health/faqs/early-pregnancy-loss
Practice Committee of the American Society for Reproductive Medicine. (2026). Recurrent pregnancy loss: A committee opinion. Fertility and Sterility, 125, 1023–1041. https://www.asrm.org/practice-guidance/practice-committee-documents/recurrent-pregnancy-loss-a-committee-opinion-2026/
Coomarasamy, A., et al. (2019). A randomized trial of progesterone in women with bleeding in early pregnancy. New England Journal of Medicine, 380, 1815–1824. https://pubmed.ncbi.nlm.nih.gov/31067371/
National Institute for Health and Care Excellence. (2026). Ectopic pregnancy and miscarriage: Diagnosis and initial management (NG126). https://www.nice.org.uk/guidance/ng126/chapter/management-of-miscarriage
Disclaimer: This article is for general educational purposes only and does not replace individualized medical advice, diagnosis, prenatal care, or treatment from a qualified healthcare professional.
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