Few things can introduce fear into the final weeks of pregnancy faster than hearing the words, “Your baby is measuring big.” One moment, you may be confidently preparing for labor and looking forward to meeting your baby. The next, conversations about growth scans, macrosomia, shoulder dystocia, induction, and cesarean birth can leave you wondering whether your body is actually capable of birthing the baby it grew.
But how much do we really know about a baby’s size before birth, and does a suspected big baby automatically mean your birth needs to change?
In this episode of the Pain Free Birth Podcast, Karen Welton tackles one of the most common fears surrounding the end of pregnancy: the “big baby.” She explores the uncertainty surrounding estimated fetal weight, the concerns providers have about shoulder dystocia, the role fear can play in labor, and the incredible physiological ways a mother’s body and baby work together during birth. Most importantly, she encourages women to move beyond fear-based decision-making, ask better questions, understand their options, and prepare for birth with knowledge and confidence.
When “Your Baby Is Measuring Big” Changes Everything
For many women, the big baby conversation begins innocently enough. A provider orders a growth scan late in pregnancy, takes measurements during an ultrasound, and announces that the baby appears to be measuring ahead. Suddenly, a pregnancy that previously felt normal can begin to feel complicated.
Maybe you are told your baby is in a high percentile. Maybe the words “fetal macrosomia” appear in your chart. Perhaps your provider begins talking about induction at 39 weeks or warns you about the possibility of shoulder dystocia. If you are petite, you may even begin wondering whether your pelvis is physically large enough to birth your baby.
The emotional shift can happen quickly. Instead of spending your final weeks preparing for labor, resting, and connecting with your baby, you may find yourself lying awake at night wondering whether your body can actually do this.
Karen challenges women to recognize how much power that label can carry. A suspected big baby is not simply a number added to a chart. It can change the way a provider approaches labor, the way a mother thinks about her body, and ultimately the atmosphere surrounding birth itself.
That is why this conversation needs to begin with information rather than fear. Before deciding what should happen next, mothers deserve to understand what providers actually know, what they are estimating, what risks they are concerned about, and what options remain available.
How Do We Know How Big a Baby Really Is?
One of the first questions Karen addresses is deceptively simple: How do we actually know how much a baby weighs before birth? The answer is that we do not place the baby on a scale. We estimate.
Late-pregnancy ultrasounds use measurements of different parts of the baby’s body to calculate an estimated fetal weight. But your baby is not lying perfectly straight in an empty space waiting to be measured. Your baby is curled inside the uterus, surrounded by fluid and maternal tissues, which makes estimating the weight of a three-dimensional human being more complicated than the certainty of a single number may suggest.
This distinction matters because mothers often hear an estimated weight presented as though it is a guaranteed birth weight. “Your baby is nine pounds” sounds very different from, “Based on these measurements, we estimate that your baby may be around nine pounds.”
Karen shares stories of women who were induced because they were told their babies were going to be very large, only to discover after birth that their babies were significantly smaller than expected. She also points to women who delivered genuinely large babies vaginally and were surprised by how smoothly pushing unfolded.
The point is not that fetal growth should never be monitored or that ultrasound information has no value. It is that an estimate should be understood as an estimate. When major decisions about induction or mode of birth are being discussed, mothers deserve to know how certain the information really is and what other factors are influencing the recommendation.
Why Providers Worry About Shoulder Dystocia
When providers become concerned about a large baby, one of the primary risks they may discuss is shoulder dystocia. This occurs when the baby’s head is born but the shoulders do not immediately deliver, often because a shoulder becomes caught behind the mother’s pubic bone.
Shoulder dystocia is a genuine obstetric emergency, which is why providers take it seriously. Once the baby’s head has been born, the birth team needs to respond appropriately to help release the shoulders and complete the birth. In a severe unresolved case, lack of oxygen can become dangerous for the baby.
Karen does not dismiss this risk. Instead, she encourages women to separate the existence of a complication from the fear that every larger baby will experience it. Large babies may have an increased risk of shoulder dystocia, but a suspected big baby does not automatically mean shoulder dystocia will occur. Smaller babies can experience it as well.
This distinction is important because informed decision-making requires more than hearing that something is possible. Mothers need to understand their individual circumstances, how likely a complication is believed to be, what interventions are being proposed to address that risk, and what evidence supports those recommendations.
If your provider recommends induction because your baby is suspected to be large, Karen encourages you to ask what specific outcome the induction is intended to prevent. Rather than allowing the phrase “big baby” to end the conversation, let it begin a deeper one about risks, benefits, alternatives, and your individual pregnancy.
The Fear of a Big Baby Can Become Part of the Birth
One of the most fascinating ideas Karen explores in this episode is that the suspicion of a big baby can influence birth in ways that have nothing to do with the baby’s eventual weight. Once a provider believes a baby may be large, that belief can change the way labor is managed.
A mother who was previously considered low risk may suddenly experience more urgency surrounding her birth. Discussions about induction and intervention become more frequent. Labor may be viewed through a more cautious lens because everyone is anticipating a possible complication. That heightened concern can influence decisions throughout labor.
But Karen believes something else can happen too. The mother herself begins to absorb the fear. She may start wondering whether her pelvis is too small, whether her baby will become stuck, or whether vaginal birth is even realistic anymore.
Birth is profoundly physical, but it is also connected to the nervous system. When humans feel threatened, we instinctively brace. Muscles tighten, breathing changes, and the body prepares to protect itself. Yet physiological birth asks the body to do something very different. Labor requires softening, opening, yielding, and allowing the baby to descend.
This does not mean a positive mindset can guarantee a particular birth outcome, nor does it mean a woman causes complications by feeling afraid. It means that emotional safety, physical relaxation, and the nervous system are meaningful parts of the birth experience and deserve to be considered alongside measurements and monitors.
Your Mind and Body Are Not Separate During Labor
Karen illustrates this mind-body connection through a story from Ina May Gaskin’s work. A woman had been concerned about whether she would be able to open enough to birth her baby, and Ina May reassured her that when the time came, she was going to “get huge.”
That encouragement stayed with the mother. During pushing, as her baby began to crown, she repeated that idea to herself and focused on allowing her body to expand. Karen shares the story as an example of how profoundly our thoughts can influence the way we approach physical sensations during birth.
Consider the difference between entering pushing with the thought, “My baby is too big and my body is too small,” versus approaching the same moment thinking, “My body can soften, open, and make room for my baby.” Neither statement guarantees what will happen next, but they can create very different internal experiences.
This is one reason birth preparation is about more than memorizing stages of labor or packing a hospital bag. Preparing the mind matters too. A mother who understands what her body is doing may be less likely to interpret every intense sensation as evidence that something is wrong. Instead, she can work with her breath, release unnecessary tension, change positions, and remain connected to what her body is communicating.
Confidence in birth is not about believing complications are impossible. It is about refusing to assume your body is incapable before labor has even begun.
Birth Is Not a Square Peg and a Round Hole
One of the biggest misconceptions surrounding large babies is the idea that birth is a simple mechanical equation. If the baby is a certain size and the mother’s pelvis is a certain size, then someone should be able to determine whether the baby will fit.
But physiological birth is far more dynamic than that. The maternal pelvis is not a rigid structure that remains exactly the same throughout labor. The joints, ligaments, muscles, and surrounding tissues allow movement, and different maternal positions can change the space available as the baby descends.
The baby is not rigid either. A newborn’s skull is made of bones that have not yet fused together. Those bones are able to mold and overlap as the head travels through the birth canal. If you have ever seen a newborn with a temporary cone-shaped head after vaginal birth, you have seen evidence of that molding process.
The soft tissues of the birth canal are also designed to stretch. Karen describes the vagina as having folds that allow it to expand as the baby descends. The pelvic floor, meanwhile, can lengthen and yield when the mother is able to relax rather than constantly brace against the sensations of birth.
Mother and baby are both moving, adapting, and responding throughout labor. This is why reducing birth to a comparison between estimated pounds and pelvic measurements misses so much of what actually happens physiologically.
Why Baby Position Can Matter More Than Baby Size
Karen also encourages mothers to consider something that often receives far less attention than estimated fetal weight: the position of the baby. A smaller baby who is poorly positioned may have a more difficult journey through the pelvis than a larger baby who is well aligned and rotating effectively.
Babies make a series of movements as they descend through the pelvis. They flex, rotate, and adjust in response to the shape of the maternal body. Sometimes a baby may be posterior, commonly described as “sunny side up,” which can contribute to intense back labor and a longer labor experience. A baby may also be asynclitic, meaning the head is tilted rather than entering the pelvis evenly.
These positions do not automatically prevent vaginal birth. Babies are remarkably capable of adjusting during labor, and mothers can often use movement and different positions to create more space. But alignment can influence how efficiently descent and pushing unfold.
This is one reason Karen believes the number on an estimated fetal weight should not become the only thing everyone focuses on. Instead of asking only, “How big is my baby?” it may be more useful to ask, “How is my baby positioned? Am I able to move during labor? Will I be supported in changing positions? Can my pelvis move freely as my baby rotates and descends?”
A few additional ounces of body fat do not tell the entire story of how a birth will unfold. Birth involves an ongoing relationship between the baby’s position, the mother’s movement, the pelvic floor, the pelvis, contractions, and the nervous system.
The Way You Push Matters
One of Karen’s greatest passions in this episode is teaching women that pushing does not have to mean holding your breath and forcefully bearing down while someone counts to ten. She contrasts this traditional style of directed pushing with physiological pushing techniques that emphasize breathing, opening the pelvic floor, and working with the body rather than fighting against it.
Karen shares that during her first two births, she pushed for approximately 30 to 45 minutes but experienced significant soreness and swelling afterward. Before her third birth, she became determined to understand whether there was another way.
During that birth, she used breathing techniques designed to help her pelvic floor open rather than clench. She describes being able to feel her baby descending as she worked with her breath, and the postpartum experience was dramatically different from her previous births.
Her experience became part of the foundation for what she now teaches women through Pain Free Birth. Instead of viewing pushing as an athletic competition where the goal is to create as much force as possible, she encourages mothers to understand the relationship between the diaphragm, breath, pelvic floor, and baby’s descent.
This can be especially encouraging for a mother who has been told she may have a larger baby. Rather than spending the final weeks of pregnancy afraid of the number on an ultrasound, she can use that time to learn practical tools for pushing, breathing, movement, and pelvic floor relaxation.
Why Birth Position Deserves a Conversation Before Labor
If a suspected big baby is part of your pregnancy, Karen believes one of the most useful conversations you can have with your provider is not simply whether they recommend induction. Ask how they support women during pushing.
Many women assume they will be able to move freely during labor, only to discover during birth that the standard position is lying or semi-reclining on the bed. Karen encourages women to learn about alternatives such as hands and knees, kneeling, supported squatting, lunging, standing, or leaning over the raised head of a hospital bed.
These positions can allow the pelvis to move differently and may help a mother work with gravity as the baby descends. The goal is not to declare one universal “best” birth position. Every mother, baby, and labor is different. What matters is having options and being supported in responding to what your body needs.
A worthwhile prenatal question is, “What positions are you comfortable supporting during pushing?” You can also ask whether your provider routinely delivers babies when mothers are on hands and knees or kneeling rather than assuming you will automatically be placed on your back.
These conversations can reveal a great deal about the birth environment before you are in the intensity of labor. If your goal is a physiological birth, knowing how your team approaches movement and pushing can be just as valuable as knowing their policies around induction.
What Happens If Shoulder Dystocia Actually Occurs?
Because shoulder dystocia is one of the fears most commonly associated with large babies, Karen wants women to understand that trained providers have specific maneuvers they can use if it occurs. Knowing that there is a plan for an emergency can help replace vague fear with practical information.
In a hospital setting, one commonly used technique is the McRoberts maneuver, which involves changing the position of the mother’s legs to alter the pelvic dimensions and help release the baby’s shoulder. Providers may also use additional techniques to rotate or release the shoulders depending on the circumstances.
Karen also discusses the Gaskin maneuver, where the mother moves onto her hands and knees. She shares an experience from her own second birth when her midwife suspected her baby could have difficulty at the shoulders. Karen moved onto hands and knees with one leg brought forward, creating a runner’s-lunge type position, and her midwife was able to help the baby rotate and deliver.
In rare and severe circumstances, additional emergency measures may become necessary. This is why choosing a provider who is trained and experienced in recognizing and managing shoulder dystocia matters, regardless of whether you are planning a hospital birth, birth center birth, or home birth.
Rather than spending pregnancy terrified of shoulder dystocia, Karen suggests turning that fear into a conversation with your provider. Ask whether they have managed shoulder dystocia before, what maneuvers they use, how they approach maternal positioning, and how their team responds when it occurs.
What About Gestational Diabetes?
Gestational diabetes often becomes part of the big baby conversation because poorly controlled blood sugar can affect fetal growth. Karen acknowledges that this adds another layer to the discussion and encourages mothers with gestational diabetes to take their diagnosis seriously, manage their blood sugar, and work with knowledgeable providers.
At the same time, she encourages women not to stop asking questions simply because a diagnosis appears in their chart. If induction is recommended, ask what factors in your individual pregnancy are driving that recommendation. Ask about your blood sugar patterns, your baby’s growth, and what benefits and risks your provider sees in different options.
This is where individualized care becomes especially important. A podcast episode cannot tell you what is right for your specific pregnancy, and Karen is careful to remind listeners that she is providing education rather than personal medical advice.
The larger message is that you are still allowed to understand your options. A diagnosis does not eliminate informed consent. You can take a medical condition seriously while also asking for evidence, clarification, and a conversation about what makes the most sense for you and your baby.
Turn Fear Into Better Questions
If you have recently been told your baby is measuring large, your first instinct may be to search the internet for every possible complication. But Karen encourages mothers to redirect that energy toward becoming informed rather than becoming afraid.
Start by asking how your baby’s estimated weight was determined and how much uncertainty exists around that estimate. Ask your provider what specific risk concerns them, whether other factors in your pregnancy contribute to that risk, and what outcome they hope to improve through the intervention they are recommending.
If induction is suggested, ask about the benefits, risks, and alternatives. If shoulder dystocia is the concern, ask how your provider manages it. If you want freedom of movement during labor, discuss birth positions before labor begins. If you want to push physiologically, learn how your provider typically coaches pushing and whether they are comfortable allowing your body to lead when mother and baby are doing well.
These questions are not about fighting with your provider or refusing medical care. They are about participating in your own care. An informed mother can respect medical expertise while also recognizing that she has a voice in decisions about her body and baby.
Prepare for Birth With Knowledge Instead of Fear
Perhaps the most important takeaway from this episode is that hearing the words “big baby” does not have to steal your confidence. You can acknowledge that larger babies may carry certain risks without assuming that your body is destined to fail. You can respect medical concerns without allowing fear to become the only voice guiding your decisions.
Your body is not a rigid container, and your baby is not an immovable object. Your pelvis can move, your baby can rotate, your baby’s head can mold, your pelvic floor can yield, your birth canal can stretch, and your position can change throughout labor. These physiological realities deserve a place in the conversation alongside estimated fetal weight and risk assessments.
Use the final weeks of pregnancy to prepare for the things you can influence. Learn how your pelvic floor works. Practice breathing techniques. Explore upright and forward-leaning birth positions. Learn about physiological pushing. Talk with your provider about their approach to movement and shoulder dystocia. Surround yourself with people who help you feel informed, supported, and safe rather than people who reinforce the belief that your body is incapable.
None of this guarantees a specific outcome, and empowered birth does not mean refusing intervention when it becomes necessary. Sometimes plans change. Sometimes complications arise. Sometimes induction or cesarean birth becomes the safest choice for an individual mother and baby. Being informed means you can make those decisions with greater understanding rather than simply reacting to fear.
Disclaimer: This blog is for educational purposes only and is not intended as medical advice, diagnosis or treatment. Please consult with a qualified healthcare provider regarding your individual health, pregnancy, birth, or postpartum care. The views and opinions expressed by guests are their own and do not necessarily reflect those of the host or Pain Free Birth.
Want to Experience a Faith-Filled Birth Too?
If you’re ready to transform your mindset and birth with peace and purpose, check out the free Unlocking a Pain Free Birth Masterclass. Discover the 3 keys to a Pain-Free birth so you can experience the joyful, supernatural power of birth the way God designed it.
Join Karen’s Doula Certification Waitlist HERE
