A baby's first breath is triggered by a combination of factors: the sudden sensory shock of birth (cold, light, touch), a drop in oxygen and rise in carbon dioxide as the umbilical cord is clamped, the physical squeeze through the birth canal, and the removal of a placental respiratory inhibitor, all activating the brain's respiratory center to gasp and cry, inflating the lungs.
At birth, the baby's lungs are filled with fluid. They are not inflated. The baby takes the first breath within about 10 seconds after delivery. This breath sounds like a gasp, as the newborn's central nervous system reacts to the sudden change in temperature and environment.
There are also other kinds of sensory stimulation after birth, such as exposure to light and sound, as well as tactile stimulation from labor contractions as the fetus descends through the birth canal, and as the newborn is quickly dried off immediately after birth. All of these help trigger the infant's first breath.
The first breaths after birth are characterized by a rapid transition from liquid- to air-filled lungs. Air is drawn into the lung during inspiration, and some remains at end expiration to establish an end-expiratory gas volume or functional residual capacity (FRC).
At birth, the lungs are still full of liquid until the first breath is taken. It seems that the first inspiratory effort plays a critical role by generating an active pressure gradient to shift the fluid into the interstitial tissue, where it will be gradually removed by the pulmonary and lymphatic circulations.
The hardest week with a newborn is often considered the first six weeks, especially weeks 2-3, due to extreme sleep deprivation, constant feeding demands, learning baby's cues, postpartum recovery, and a peak in inconsolable crying (the "witching hour"), making parents feel overwhelmed as they adjust to a new, exhausting routine. While the first week is tough, the challenges often intensify as the baby becomes more alert but still fussy, with major developmental hurdles like cluster feeding and increased fussiness peaking around 6-8 weeks.
The 7 key danger signs for newborns, often highlighted by organizations like the WHO, are not feeding well, convulsions, fast breathing, severe chest indrawing, lethargy/unconsciousness (movement only when stimulated), high or low temperature, and jaundice (yellow skin/soles) or signs of local infection like an infected umbilical stump, requiring immediate medical attention.
The following are some of the normal reflexes seen in newborns.
By 10–12 weeks of gestation, developing babies begin taking “practice” breaths. But these breaths provide them with no oxygen, and only refill the lungs with more amniotic fluid. Because it's normal for a fetus's lungs to be filled with fluid, a fetus can't drown in the womb.
The “Golden Minute” refers to the first 60 seconds of an infant's life. Within these limited seconds, the infant should begin breathing on his or her own, or interventions must be started. Approximately 4,000,000 babies are born each year in the United States.
If at any time there is concern about your baby's breathing, some immediate steps are taken, including: Using suction to clear the airway passages, including the nose, mouth and possibly the windpipe. Warming your baby. Massaging or stroking the skin to stimulate crying.
To soothe a crying baby:
Birth attendants often use a self-inflating bag to help the baby start breathing. The amount of air the baby needs depends on its size. 'If you've got a tiny baby, who's maybe 500 grams, you need a little breath,' Mark says.
Symptoms of a Breath-Holding Spell
An upsetting event happens right before the spell. A common trigger is being angry about parents setting limits (temper tantrums). Another is getting scared. Some spells are triggered by a sudden injury, such as falling down.
Signs of Fetal Distress
It usually disappears by about 2 months of age. Sometimes, startling can continue for three or four months. Some babies continue to startle even longer, but if your baby still has a startle reflex after 6 months, talk to their doctor.
Seesaw Breathing.
With breathing, the chest seems to contract when the stomach expands. The cause is the soft rib cage of some newborns. It tends to pull in during normal downward movement of the diaphragm. Yawning or Sighing (off and on) to open up the lungs.
Comfort and Self-Soothing
For many babies, putting their hands behind their head can be a self-soothing technique.
Why Does SIDS Peak at 2-4 Months? The widely accepted explanation for the SIDS peak has to do with the timeline of brain development. “Up to 4 months old, the part of the brain that controls breathing and wakefulness is under a lot of development,” Juliet explains.
Hold your baby until they're in a deeper sleep. Babies start in 'active sleep' (with faster, uneven breathing) and move into a deeper sleep after about 20 minutes. That's a good time to transfer them into their sleeping place. Many babies don't like being put down into a cot.
The first three months with your baby often seem the hardest. Sleep-deprived parents can feel overwhelmed, but that is normal and you will quickly learn how to read your baby's cues and personality. Don't worry about “spoiling” your baby at this stage.
The hardest week with a newborn is often considered the first six weeks, especially weeks 2-3, due to extreme sleep deprivation, constant feeding demands, learning baby's cues, postpartum recovery, and a peak in inconsolable crying (the "witching hour"), making parents feel overwhelmed as they adjust to a new, exhausting routine. While the first week is tough, the challenges often intensify as the baby becomes more alert but still fussy, with major developmental hurdles like cluster feeding and increased fussiness peaking around 6-8 weeks.
No bowel movement in the first 48 hours. A rectal temperature over 100.4 degrees F (38 degrees C) or less than 97.5 degrees F (36.5 degrees C). A rapid breathing rate over 60 per minute, or a blue coloring that does not go away. Newborns normally have irregular respirations, so you need to count for a full minute.
Beyond the cuteness explosion you can expect when Baby starts smiling around 6 to 8 weeks, it's also an exciting time for their development. Baby's vision and facial recognition is improving, and they're outgrowing their early reflexes. They're also beginning to express feelings, such as excitement or contentment.