Effect of Kangaroo Mother Care during the first 72 hours of life on early growth and breastfeeding in normal birth weight newborns: Protocol for a Randomised Controlled Trial

This protocol outlines a multicentre, randomised controlled trial in India designed to evaluate whether prolonged Kangaroo Mother Care (at least 8 hours daily) during the first 72 hours of life improves early weight gain, breastfeeding quality, and maternal-infant bonding in healthy, normal birth weight newborns compared to standard care.

The Gist

Imagine a newborn baby as a tiny, delicate spacecraft that has just landed on a new, cold, and chaotic planet (the outside world) after spending nine months in a warm, safe, and perfectly regulated space station (the womb).

This research paper is a protocol (a detailed recipe for a scientific experiment) designed to test a specific idea: Does keeping this "spacecraft" glued to its "launchpad" (the mother's chest) for a longer time help it land more smoothly?

Here is the breakdown of the study in simple, everyday language:

1. The Big Idea: "The Kangaroo Hug"

You've probably heard of Kangaroo Mother Care (KMC). It's like a kangaroo carrying its baby in a pouch. Doctors have known for a long time that this "skin-to-skin" hug is a miracle cure for tiny, premature babies (the ones who are too small to survive on their own). It keeps them warm, helps them breathe, and helps them grow.

The New Question: What about healthy, normal-sized babies?
Currently, the rule is: "Give the baby a cuddle for the first hour, then put them in a crib."
This study asks: What if we kept that cuddle going for the first 72 hours (3 days)? Would it help healthy babies grow faster, cry less, and breastfeed better?

2. The Experiment: A Race Between Two Groups

The researchers are going to run a fair race with 516 healthy mothers and babies in hospitals in India.

• The Starting Line: Every baby gets a cuddle for the first hour (this is the standard of care for everyone).
• The Split: After that, the babies are randomly sorted into two teams:
  • Team A (The Kangaroo Team): These moms are encouraged to hold their babies skin-to-skin for at least 8 hours a day (and ideally up to 20 hours!) for the first three days. The baby sleeps on the mom's chest, wearing just a diaper and a hat, wrapped in a blanket. They also breastfeed right there on the chest.
  • Team B (The Standard Team): These moms get the usual hospital care. They cuddle the baby, but then the baby goes back to the crib or a bassinet for most of the time.

The "Common Ground": To make sure it's a fair test, both teams get the same basic care: good advice on feeding, vaccines, and hygiene. The only difference is how much time the baby spends on the mom's chest.

3. What Are They Looking For? (The Scoreboard)

The researchers are checking three main things to see if the "Kangaroo Hug" wins:

1. The Weight Drop: Babies usually lose a little weight in the first few days as they adjust. The researchers want to see if the Kangaroo Team loses less weight than the Standard Team. (Think of it as the baby not burning as much energy trying to stay warm).
2. The Growth Speed: By day 28, are the Kangaroo babies gaining weight faster?
3. The Latch: Breastfeeding can be tricky at first. The researchers will watch how well the baby latches on. They want to see if the Kangaroo babies are better at breastfeeding because they are practicing while resting on their mom's chest.

They are also checking secondary things: Is the mom less stressed? Do the babies get sick less often? Do the moms feel more connected to their babies?

4. Why Do This? (The "Why" Behind the "What")

Think of the first 72 hours of life as the most critical "boot-up" sequence for a computer. If the system crashes during boot-up, it takes forever to fix.

• For premature babies: KMC is like a "survival mode" patch.
• For normal babies: The researchers think KMC might be a "performance upgrade." Even though these babies are healthy, the transition from the womb is still a shock. Keeping them close to the mom might smooth out that transition, making them calmer, warmer, and better at feeding.

5. The Challenges (The "Fine Print")

• You Can't Hide It: You can't blind a mom to whether she is hugging her baby or not. It's obvious. So, the researchers have to be very careful that the people measuring the results (the judges) don't know which team the baby is in, so they don't accidentally favor one side.
• The "Honesty" Factor: Since the moms know what they are doing, they might try extra hard. The researchers are using trained helpers to teach the moms exactly how to do it, so everyone does it the same way.
• Who is in the Race? They are only testing healthy, full-term babies born naturally (no C-sections). This keeps the experiment simple. If a baby gets sick or needs a special incubator, they stop the hug and get the medical care they need.

6. The Goal: Changing the Rules

If this study proves that hugging healthy babies for 3 days straight helps them grow better and feed easier, it could change the rules of the world.

Right now, we treat KMC like a life vest for drowning babies (premature ones).
This study hopes to prove that KMC is actually a vitamin for all babies—a simple, free, natural way to help every newborn start life on the right foot.

In short: The researchers want to find out if a little extra hugging and skin-to-skin time is the secret sauce that helps healthy babies thrive in their first few days of life.

Technical Summary

Based on the provided document, here is a detailed technical summary of the research protocol.

1. Problem Statement

The transition from intrauterine to extrauterine life is a critical physiological window for newborns, requiring rapid adaptation in thermoregulation, metabolism, and respiration. While Kangaroo Mother Care (KMC)—defined as prolonged skin-to-skin contact (SSC) and exclusive breastfeeding—is the established gold standard for improving survival and outcomes in preterm and low-birth-weight (LBW) infants, its application to normal birth-weight (NBW) infants remains underexplored.

Current guidelines recommend SSC for only the first hour of life for healthy term infants. However, biological plausibility suggests that extending SSC beyond this initial hour (specifically for the first 72 hours) could confer similar benefits to NBW infants, including:

• Improved metabolic and thermal stabilization.
• Enhanced breastfeeding initiation and quality.
• Reduced early weight loss.
• Strengthened maternal-infant bonding.

There is a significant evidence gap regarding whether prolonged KMC is beneficial for the majority of newborns (NBW), as prior research has largely excluded this population.

2. Methodology

This document outlines the protocol for a multicentre, individually randomised, controlled, open-label superiority trial.

• Study Design: Parallel-group RCT with a 1:1 allocation ratio.
• Setting: Three public health facilities in Uttar Pradesh, India (Queen Mary Hospital, Veerangana Avanti Bai District Women's Hospital, and District Women's Hospital, Barabanki).
• Participants:
  • Inclusion: Healthy singleton neonates with birth weight $\ge$ 2500g, delivered via uncomplicated vaginal delivery, with mothers residing within a 50km catchment area.
  • Exclusion: Infants requiring NICU admission, major congenital anomalies, multiple births, C-sections, maternal HIV+ (planning replacement feeding), or maternal skin conditions hindering KMC.
  • Sample Size: 516 dyads (258 per group), calculated to detect a 25% reduction in early weight loss with 90% power and a design effect of 2.0.
• Intervention Groups:
  • Intervention Group: Receives Prolonged KMC for the first 72 hours. This involves a minimum of 8 hours (targeting >20 hours) of daily SSC with exclusive breastfeeding in the KMC position. Mothers are supported by a trained lay-worker team (KMC team) to practice self-latching and ambulatory KMC. They are encouraged to continue this at home for the first 28 days.
  • Control Group: Receives Standard Care, which includes a "Common Minimum Package" (initiation of breastfeeding via uninterrupted SSC in the first hour, essential newborn care counselling, vaccinations, and routine facility care).
  • Note: Both groups receive the same baseline counselling on thermal care and hygiene to ensure ethical equivalence.
• Outcomes:
  • Primary Outcomes:
    1. Mean percentage weight loss at 48 hours.
    2. Weight gain velocity (g/kg/day) up to 28 days.
    3. Proportion of dyads with moderate-to-poor breastfeeding quality (Bristol Breastfeeding Assessment Tool [BBAT] score <7) at 7 days.
  • Secondary Outcomes: Exclusive breastfeeding rates at 28 days, maternal breastfeeding experience, incidence of Possible Serious Bacterial Infection (PSBI), maternal depression (EPDS), mother-infant bonding (MIBS), and breastfeeding self-efficacy.
• Data Collection & Analysis:
  • Data is collected electronically via REDCap on tablets.
  • An Independent Outcome Assessment (IOA) team, masked to group allocation, conducts all follow-up assessments (Days 1, 2, 4, 8, 15, 29).
  • Statistical Analysis: Primary analysis will be Intention-to-Treat (ITT). Continuous outcomes (weight loss/velocity) will be analyzed using Linear Mixed-Effects Models (LMM); binary outcomes (BBAT score) using Mixed-Effects Logistic Regression. Adjustments will be made for site, parity, infant sex, and baseline birth weight. No multiplicity adjustment will be applied to the three co-primary outcomes as they represent a single construct ("successful neonatal transition").

3. Key Contributions

• First RCT on NBW Infants: This is the first multicentre randomised controlled trial to specifically evaluate the efficacy of prolonged KMC (beyond the first hour) for healthy, normal birth-weight infants.
• Holistic Assessment: The study moves beyond survival metrics to evaluate a comprehensive range of outcomes including metabolic stability (weight loss), growth trajectory, breastfeeding quality, maternal mental health, and bonding.
• Rigorous Methodology: The protocol employs robust measures to mitigate bias in an open-label trial, including:
  • Stratified randomization by site.
  • A masked Independent Outcome Assessment (IOA) team.
  • Standardized "Common Minimum Package" for both groups to ensure ethical care.
  • Use of validated tools (BBAT, EPDS, MIBS, BSES).
• Scalability Focus: Conducted in public health facilities in India, the study design is pragmatic, aiming to generate evidence that is directly applicable to low-resource settings and scalable for national guidelines.

4. Results

No results are available in this document.
The provided text is a study protocol (registered in 2024, posted in 2026), detailing the planned methodology, objectives, and analysis strategies. The trial has not yet been completed or published with outcome data. The document explicitly states: "NOTE: This preprint reports new research that has not been certified by peer review and should not be used to guide clinical practice."

5. Significance

• Paradigm Shift: If successful, the findings could challenge the prevailing paradigm that KMC is solely a risk-reduction intervention for vulnerable (preterm/LBW) infants. It could reposition prolonged KMC as a salutogenic (health-promoting) standard of care for all newborns, regardless of birth weight.
• Guideline Impact: The results are intended to inform national (India) and international guidelines on essential newborn care, potentially extending the recommended duration of SSC from 1 hour to 72 hours or longer for healthy term infants.
• Public Health Impact: Given that normal birth-weight infants constitute the vast majority of the global newborn population, even modest improvements in breastfeeding success, growth, and maternal bonding could yield significant public health benefits.
• Future Research: The study will provide critical data on the optimal "dose" of KMC, its applicability in different delivery modes (future studies may include C-sections), and its long-term developmental effects.