Pregnancy is one of the biggest transformations a person can experience. Even if it’s not yet visible from the outside, the first trimester of pregnancy is a time of profound change. Your body, hormones, emotions, and sense of identity are all shifting—often quietly, and sometimes intensely.
During these early weeks, many women are surprised by how much is happening beneath the surface. Adjusting to the idea of becoming a mother can feel exciting, overwhelming, confusing, or all of the above. Understanding what is going on in your body—and how gentle practices like prenatal yoga can support you—can make a meaningful difference.
So what exactly happens during the first trimester, and how can yoga help you navigate these early weeks after implantation of the embryo in the endometrium?
Physical changes during the first trimester of pregnancy
Hormonal changes begin almost immediately after conception. Increased levels of human chorionic gonadotropin (hCG) are what pregnancy tests detect. This hormone acts as an immunosuppressant, slowing down the immune system to prevent the body from rejecting the developing baby and to support the growing foetus.
Levels of progesterone and oestrogen also rise significantly during the first trimester. These hormonal shifts are one of the reasons you may feel more sensitive, emotional, or moody. Strong emotional fluctuations are a normal response to the rapid internal changes taking place.
Progesterone plays a key role in preventing the uterus from contracting, helping to avoid premature labour. Oestrogen, on the other hand, increases blood flow and supports the growth of the uterus and other tissues necessary for pregnancy [1].
Digestive changes and fatigue
Higher hormone levels can greatly affect the digestive system. During the first trimester, it’s common to experience:
- Nausea or morning sickness
- Heartburn
- Slower digestion or indigestion
- Constipation and bloating
Heightened sensitivity to smells, changes in food preferences, food cravings, increased hunger, or loss of appetite are also very common.
If you’re someone who never paid much attention to nutrition, pregnancy can be a gentle invitation to start making more balanced food choices that support both you and your baby.
Another important hormone during pregnancy is relaxin. Relaxin loosens muscles, ligaments, and joints so the body can adapt to your growing baby. As birth approaches, it also softens the cervix and increases mobility in the pelvic joints. However, high levels of relaxin can sometimes create pelvic joint instability, leading to pelvic girdle pain.
Other common physical changes include breast tenderness and sensitivity, an increase in breast size (which can cause discomfort), and more frequent urination due to increased blood flow to the pelvic area.
A few days after implantation, the placenta begins to form. This temporary yet vital organ transfers oxygen and nutrients to the baby, removes waste products, and produces hormones. Growing an entirely new organ requires a great deal of energy, which often results in intense fatigue—a clear signal from the body to slow down and rest.
Increased blood production combined with lower blood pressure (which allows the heart to pump additional fluid) can further contribute to exhaustion during the first trimester.
Emotional shifts in early pregnancy
Once you find out you’re pregnant, you may experience a wide range of emotions, from joy and excitement to nervousness, ambivalence, or even unhappiness, especially if the pregnancy was unplanned.
Anxiety is also common, particularly if you’ve experienced miscarriage, fertility challenges, or difficult pregnancies in the past. You might worry about your ability to give birth, care for a baby, or cope with the changes ahead.
Concerns about finances, shifting priorities, organisation, relationships, or putting a career on hold can add another layer of stress. Acknowledging these emotions and addressing them early can help you integrate the reality of pregnancy and prepare—emotionally as well as physically—for the transition into motherhood.
How can yoga support you in the first trimester?
Whether you’re a seasoned yoga practitioner or completely new to yoga, the first 14–16 weeks of pregnancy are a time to slow down. This is often not the moment to push yourself physically, but rather to rest, listen, and adapt.
Giving yourself permission to sleep more and reduce the intensity of your usual yoga asana practice can be deeply supportive. Instead of focusing on strength or flexibility, shift your attention inward.
Breath awareness and gentle movement
Breathwork can be especially grounding during early pregnancy. Choosing breathing techniques that gently extend the exhale can help calm the nervous system and reduce stress (link to blog post).
Your yoga practice may look very different from what it used to—and that’s okay. Adapt your movement to match your energy levels from day to day. Some days, restorative poses may be all your body needs.
My favourite yoga poses for the first trimester
Restorative Butterfly Pose
Place one block on the highest setting and another next to it on the lowest setting, creating an “L” shape. Lean a bolster or thick rolled towel on top to create a comfortable incline.
Sit on a folded blanket in front of the bolster. Bend your knees and allow them to fall open, bringing the soles of the feet together. Support the thighs with cushions if needed. Alternatively, bring your feet wider than your hips and let the knees rest together, or extend your legs and place a pillow under the knees to release the lower back.
Lean back so the entire length of your spine is supported. Stay for as long as it feels comfortable, and come out of the posture slowly and gently.
This is a deeply nourishing pose that can help replenish energy. It pairs beautifully with guided meditation, yoga Nidra, or simple mudras (hand gestures). It may also ease indigestion and heartburn.
Rolling Cat and Adapted Child’s Pose
Come onto all fours, using a folded blanket under the knees for comfort. Place the wrists under the shoulders and the knees under the hips. Keep the spine long, with the head and neck as an extension of the spine.
On an exhale, round the upper back and gently sit back towards the heels. Inhale to bend the elbows and bring the torso forward, keeping the shoulders behind the fingertips and the back long. Repeat a few times.
Then rest in Adapted Child’s Pose: widen the knees, bring the big toes together, and support the head and torso with cushions or a bolster. Elevate the hips with blocks if needed.
Rolling Cat gently mobilises the spine without exaggerating lower back lordosis. Placing a foam block between the thighs can increase engagement around the pubic symphysis and may be beneficial for pelvic girdle pain (PGP), symphysis pubis dysfunction (SPD), or a weak pelvic floor.
Adapted Child’s Pose can also help relieve digestive discomfort.
Lateral Stretches and Side Breathing
Sit upright and place your left fingertips on the floor for support. Inhale to lift the right arm overhead, and exhale to gently side bend to the left, keeping both sides of the torso long and the chest open.
Breathe into the side body, expanding the ribcage and back. Return to centre and repeat on the other side.
Side breathing can help improve shallow breathing patterns and may support the abdominal wall, potentially reducing strain along the linea alba and lowering the risk of diastasis recti.
Conclusion: Honouring the first trimester
Yoga during the first trimester should prioritise rest, relaxation, and emotional support. These practices help restore energy, encourage self-nurturing, and build awareness that will support you throughout pregnancy.
If you’re relatively inactive, prenatal yoga is a gentle and effective way to improve physical fitness—so there’s no need to fear starting. If you’re already active, this is a time to modify or pause practices that no longer feel supportive.
Move mindfully to protect the pelvic floor (avoid bearing down) and the abdominal wall (avoid overloading). Shelve strenuous or heat-based practices like hot yoga, and choose instead calming, grounding sessions that promote rest and better sleep.
Regular, well-adapted yoga practices can support implantation, improve posture and pelvic awareness, and help you feel more grounded and centred. Perhaps most importantly, they help you cultivate breath awareness—an invaluable tool for managing anxiety, fear, and the many transitions pregnancy brings.
Ready to feel more supported during pregnancy?
And if you’re looking for a way to connect with your body, your baby, and your breath during pregnancy—I’d love to invite you to join me in my free yoga series: Balanced Before Birth – A Free Yoga Series for Pregnant Mothers
This gentle, grounding 5-day yoga series is designed especially for you if you’re pregnant and want to:
- Feel more at ease in your changing body
- Cultivate calm and confidence before birth
- Carve out a moment of daily self-care, no matter how busy life feels
Each session includes a short, accessible yoga class, mindful breathing, and affirmations to help you move through pregnancy with more balance and intention.
Sign up here for free and start creating your own rhythm of rest, movement, and connection before baby arrives.
References
[1] What to Expect – Pregnancy Hormones
https://www.whattoexpect.com/pregnancy/pregnancy-health/pregnancy-hormones.aspx
