Welcoming a newborn into the world is a moment that fills parents with mixed emotions, ranging from the joy of having another family member to worries about the newborn’s health. One of the first numbers a parent hears right after the baby’s birth is the baby’s weight, and no parent is pleased to hear that their baby has a Low Birth Weight. Understanding what a normal infant weight is and learning how to take care of an underweight baby can help the parents feel confident and prepare for the challenges ahead.

What is Low Birth Weight?

Low Birth Weight (LBW) is a clinical term that describes a baby who weighs under 2.5 kilograms (5.5 lbs.) at birth. As an indicator of a baby’s health, the average normal infant weight is between 2.5 kg and 4.0 kg.

There are three categories that classify LBW babies:

  • Low Birth Weight (LBW): 2.5 kg or less
  • Very Low Birth Weight (VLBW): 1.5 kg or less
  • Extremely Low Birth Weight (ELBW): 1.0 kg or less

Low Birth Weight is common in India due to high rates of anaemia, inappropriate nutrition, and the prevalence of premature births. Although parents may have greater concerns about the health of a baby born with low weight, most children catch up in growth and development with those born at a normal weight.

What are the Causes of Low Birth Weight?

The causes of a baby having LBW can be divided into several conditions:

  • Maternal Nutrition/Anemia: Inadequate nutrition during pregnancy and maternal anaemia contribute to restricted fetal growth and Low Birth Weight in infants.
  • Preterm Birth: A baby born before the 37th week of pregnancy cannot gain sufficient weight due to insufficient time to develop fully.
  • Maternal Factors: Pregnancy-related diseases and disorders such as hypertension, cardiac issues, diabetes, and infections affect the fetus’s growth in the womb.
  • Multiplicity: Moms carrying twins or triplets often give birth to babies that are underweight due to reduced placental perfusion.
  • Placenta: The placenta’s malfunction and failure to provide the fetus with enough oxygen and nutrients can lead to poor intrauterine growth.

What are the Risk/Consequences of Low Birth Weight?

Due to improper growth inside the womb, Low Birth Weight (LBW) infants can face a variety of challenges and risks, such as difficulty in breathing, feeding, and regulating their body temperature. They might also experience health problems, such as a weakened immune system and low blood sugar levels in the first few weeks after birth.

Difficulty in Regulating Temperature

Inability to maintain a constant/internal body temperature since they cannot store heat efficiently.

Feeding Difficulties

LBW infants have a weak suck reflex and small stomach size, so they may struggle during breastfeeding sessions.

Vulnerable Immune System

Newborns with low weight have a much weaker immune system, so they are at a higher risk of catching infections and colds.

Breathing Challenges

Due to their small size at birth, preterm infants with low weight at birth often have underdeveloped lungs, which may lead to breathing difficulties.

Low Blood Sugar (Hypoglycemia)

LBW infants have less energy stored as fat and glycogen, so they are at higher risk of experiencing low blood sugar levels.

What are the Symptoms of a Baby With Low Birth Weight?

The symptoms of Low Birth Weight can include several characteristic signs, apart from the obvious low weight at birth:

  • An LBW infant has a smaller size and has a bigger head in proportion to the size of their body.
  • The baby has less fatty tissue and weighs less. Bones are more prominent, especially in the legs, arms, and around the cheeks.
  • An LBW baby has a weak cry and often sleeps for longer periods due to a lack of energy.
  • Such infants have more difficulty breastfeeding as they have to exert more effort to latch, suck, and swallow.

How to Prevent Low Birth Weight?

Many of the conditions, such as improper gestational care, lack of a proper diet, deficiency of minerals and nutrients, or chronic diseases that cause LBW, can be avoided or improved with the following methods mentioned below: 

  • Attending regular prenatal care visits allows moms to monitor their health condition throughout pregnancy and ensure that the fetus develops adequately.
  • Sticking to a balanced diet during pregnancy is essential for fetal growth and helps prevent several birth complications.
  • Taking iron and calcium supplements is crucial for preventing anaemia and other nutritional deficiencies.
  • Chronic diseases such as hypertension require special attention and control during pregnancy.

How to Take Care of a Baby With a Low Birth Weight?

Taking care of a LBW baby requires you to focus on four essential daily practices, such as helping them regulate body temperature, feeding them frequently, tracking their weight, and maintaining hygiene. By combining these simple practices with regular paediatric guidance, you can give your little one the specialised support they need to grow strong and gain weight properly.

Provide Warmth

Hold your baby directly against your bare chest as often as you can, tuck your baby under your shirt so their chest rests against yours. This simple habit helps regulate their body temperature, stabilise their breathing, and saves the vital calories they need for steady physical growth while strengthening your emotional bond.

Feed Frequently

Because smaller babies have tiny stomachs and burn energy quickly, they need to eat small amounts every 2 to 3 hours. Do not wait for your baby to cry, as Low Birth Weight infants are often too weak to show any signs of hunger. Wake them gently if they sleep past their feeding time to ensure they get a continuous stream of nutrients throughout the day to help them reach a normal infant weight.

Track Weight

Take regular appointments with your doctor to monitor your baby’s health and growth. These visits will give you much-needed reassurance about your baby’s health while allowing your doctor to track the baby’s development to adjust their feeding schedule and support your recovery.

Hygiene and Comfort

Preterm babies are not only underweight but also have very thin, delicate skin that can get irritated due to moisture and friction. Plus, due to their smaller size, a regular diaper may not fit them well, leading to leaks. Opting for options like MamyPoko Preemie diapers can be helpful in such scenarios. These diapers have a soft, air-silky sheet to keep your baby comfortable and adjustable tape-style tabs that allow for a snug fit no-matter how small the baby may be. They are built with a breathable dry sheet that pulls moisture away instantly to keep their skin dry, cool, and free from diaper rash. Choosing the right diaper can help you maintain proper hygiene, ensuring your baby always stays comfy and smiling.

Conclusion

Every extra gram of weight that your baby gains is an indication of their resilience and your care. Hearing that your newborn has a Low Birth Weight is distressing for any parent, but you should understand that this is simply the starting point of their story, not the final destination. By helping them keep warm, feeding them frequently throughout the day, monitoring their growth regularly, and maintaining proper hygiene, you will be giving them the much-needed support they need to thrive.