02/10/2026
This is very true and can give parents undue stress and worry 😢 Often 🤱🏼Patents are told to unnecessarily supplement 👩🏻🍼by heath professionals
That first number on the scale right after birth often isn’t a baby’s true baseline weight, and understanding why can save so many mothers unnecessary stress in those first days.
Babies are born covered in amniotic fluid, blood, and vernix, and many have not yet had time to p*e or adjust their fluid balance outside the womb. On top of that, many mothers receive IV fluids for hydration, medications, epidurals, or induction. Research shows that some of this extra fluid crosses the placenta and temporarily increases a newborn’s fluid volume at birth. In other words, babies can be born carrying extra fluid that isn’t actually part of their long term body mass….
Then, over the first 24 to 72 hours of life, babies naturally begin to p*e out that extra fluid as their kidneys start working independently. This process is called “postnatal diuresis.” As a result, the number on the scale drops, and families are often told their baby has “lost weight.” BUT in many cases, this isn’t true weight loss from poor feeding or inadequate milk. It is simply the baby returning to their real fluid balance after birth.
Several studies have shown that larger volumes of maternal IV fluids during labor are associated with GREATER early newborn weight loss, suggesting that part of this early drop reflects fluid shifts rather than nutritional problems. Babies whose mothers receive higher amounts of IV fluids tend to show more early weight loss, even when feeding is going well.
This matters because early weight checks are often used to judge breastfeeding success. When fluid related weight shifts are mistaken for feeding problems, families may feel pressured, discouraged, or pushed toward supplementation before it is truly needed.
Of course, weight monitoring remains *important*, and TRUE excessive weight loss or signs of dehydration should always be taken seriously. But numbers should always be interpreted alongside feeding effectiveness, diaper output, and the baby’s overall clinical condition.
Sometimes the scale is showing us fluid adjustment, not feeding failure.
So if you see the number drop in those first days, remember that birth is a huge transition. Babies are moving from a fluid filled environment to regulating their own bodies for the very first time. Give them, and yourself, grace as that adjustment happens.
Watch the baby, not just the scale.