Newborns are little miracles, but they are also particularly vulnerable. Their immune systems are not yet fully developed at birth, yet in the first few months they are often surprisingly well protected. This phenomenon is called "nest protection."
But what exactly does this entail? How long does this protection last, and what can parents do to support it? This magazin answers all these questions and provides you with valuable information on how to best protect your newborn.
What is nest protection?
"Nest protection" refers to the immune protection a baby receives from its mother. It is also called "acquired immunity" or "passive immunization." Simply put, the mother passes on her immune protection to the child for a certain period of time (source: https://www.rki.de/SharedDocs/FAQs/DE/Impfen/Nestschutz/FAQ-Liste-Nestschutz.html#entry_16956488).
How Does Nest Protection Develop? The Path of Antibodies
Antibodies are transferred in two main ways: through the placenta during pregnancy and through breast milk after birth (source: https://www.rki.de/SharedDocs/FAQs/DE/Impfen/Nestschutz/FAQ-Liste-Nestschutz.html#entry_16956492).
Transmission in the Womb: The Placenta
In the womb, so-called IgG antibodies cross the placenta to the unborn baby. These antibodies act like little messengers that teach the baby how to recognize and fight off certain pathogens. It is particularly important to note that the majority of these antibodies are not produced until the last trimester of pregnancy . This means that premature babies are often less well protected (Source: https://www.rki.de/SharedDocs/FAQs/DE/Impfen/Nestschutz/FAQ-Liste-Nestschutz.html#entry_16956492).
As early as four weeks after conception, the baby's immune cells begin to develop. This early start lays the foundation for a functioning immune system.
Protection Through Breast Milk
The first milk, colostrum, is a particularly concentrated source of antibodies and immune cells. It lays the foundation for gut health and strengthens the baby’s immune system. Breast milk primarily protects the mucous membranes in the mouth, throat, and intestines from invaders (Source: https://www.bzfe.de/presse/pressemeldungen-archiv/kolostrum-superfood-fuer-die-ersten-lebenstage).
It is important to understand that IgG protection via the placenta and mucosal protection via breast milk are two different mechanisms that complement each other.
How long does the nest guard last?
As a general rule, maternal immunity lasts about three months. However, in the case of certain illnesses, it can last until the baby is six months old. Antibody levels decline steadily as the baby’s own immune system slowly matures and learns to defend itself (Source: https://www.aok.de/pk/magazin/familie/baby-kleinkind/der-nestschutz-bei-babys/).
What Nest Protection Can and Cannot Do
The nest protector can help protect your baby from certain infectious diseases and viruses during the first few months of life. However, it is not a cure-all. There is no nest protector that can protect against all pathogens.
For example, maternal immunity against measles is often shorter-lasting and weaker if the mother has received only one vaccination and has not had a natural infection. In this case, it is important to note that there may be gaps in vaccination coverage among women of childbearing age. Similarly, without vaccination during pregnancy, there is virtually no maternal immunity against whooping cough.
Targeted Support for Nest Protection: Vaccinations During Pregnancy
The Standing Committee on Vaccination (STIKO) at the Robert Koch Institute recommends certain vaccinations during pregnancy to strengthen maternal protection. These include, among others, vaccinations against influenza, COVID-19, and pertussis (source: https://www.rki.de/DE/Themen/Infektionskrankheiten/Impfen/Impfthemen-A-Z/S/Schwangerschaft-Stillen.html#entry_16822134).
It’s a good idea to check your vaccination status as soon as you start planning to have a baby and to fill in any gaps in your vaccination history. This is because antibodies are only passed on if they’re present in the mother. This means that getting vaccinated during pregnancy not only protects the mother but also gives the baby a better start in life. Talk to your OB-GYN about your vaccination status and ask for advice.
Strengthening the Immune System of Babies and Toddlers
Infections play an important role in the development of the immune system. Frequent colds during childhood help the body adapt to various pathogens and build a strong immune system. This is especially important when children start daycare, as well as in the fall and winter, when the risk of infection is higher.
A balanced diet is also an important foundation for a strong immune system. Breastfeeding, whenever possible and desired, further supports the development of the immune system. However, it is important that mothers who are unable to breastfeed do not feel pressured (Source: https://www.aok.de/pk/magazin/familie/eltern/immunsystem-von-kindern-staerken-praktische-tipps/).
When Should You See a Pediatrician?
Watch for warning signs in infants, especially those under three months of age: fever, difficulty feeding, and unusual drowsiness. Follow the immunization schedule for the first year of life and schedule appointments for the U-checkups. Use the U-checkups as an opportunity to ask your pediatrician any questions you may have.
Distinction: Nest protection ≠ baby nest
It is important not to confuse the term “nest protection” with the product “baby nest.” Nest protection refers to the immune protection a baby receives from its mother. The baby nest, or crib bumper, is a sleeping accessory.
Crib bumpers can interfere with air circulation and cause heat to build up; loose straps pose a strangulation hazard; the material should be breathable and low in harmful substances; the sleeping surface should be firm and level. Not suitable for unsupervised nighttime sleep. Ensure a safe sleeping environment for your baby.
Frequently Asked Questions About Nest Protection
How long does the nest guard last?
About three months; for some conditions, up to the sixth month of life.
Do babies born by C-section have less nest protection?
Babies born by C-section receive fewer maternal microbes, but this is no cause for concern.
Does breastfeeding protect against infections?
Yes, breastfeeding provides additional protection through the transfer of antibodies and immune cells.
Is there any protection against measles in daycare settings?
Nest protection against measles depends on the mother's vaccination status.
Why do babies get sick even with nest protection?
Nest protection is not comprehensive and does not protect against all pathogens.
Conclusion
The newborn protection period is a valuable but temporary safeguard for your baby. Vaccinations, checking your child’s vaccination status, and regular follow-ups with your pediatrician bridge this gap and ensure the best possible start to a healthy life. Review your child’s vaccination record and seek medical advice if needed.
