Baby Born at 36 Weeks: Causes, Risks and How to Care

Baby Born at 36 Weeks of Pregnancy

Medically Reviewed By
Dr. Sabiha Anjum (Gynecologist/Obstetrician)
View more Gynecologist/Obstetrician Our Panel of Experts

Normally, a full-term baby remains in the womb for nine months. And, for quite a while, even babies born at 36 weeks were treated just like the full-term babies. However, over time, experts realised that a baby needs at least 37 weeks, if not more, to develop fully and survive outside the womb. There were innumerable cases wherein babies were born at 36 weeks, but with complications. Most doctors also use tocolytic medications such as magnesium sulfate to suppress premature contractions and delay delivery by a few days. However, the delay might still not be full term. In this article, we shall talk about what could lead to childbirth at 36 weeks, and how it affects the baby. Read on to know about childbirth at 36 weeks of pregnancy.

What Causes Child Birth at 36 Weeks?

A number of reasons can cause childbirth at 36 weeks. Here are some of them:

  • Bacterial infections in the mother could affect the membrane of the amniotic sac and start rupturing them. A vaginal infection leads to fluid discharge from the vagina and burning sensation while passing urine. Genital irritation is also a strong sign of such an infection. Other infections like gonorrhoea and chlamydia could also trigger premature delivery.
  • The chances of a child being born prematurely are even higher in mothers who have had previous pregnancies that also ended in premature births.

  • At times, the presence of certain health conditions of the baby or the mother-to-be might require early delivery. This is usually done at a higher risk of infant mortality if the pregnancy is allowed to continue as opposed to premature delivery. Also, unless and until there are emergency conditions, caesarean surgery is only done after 37 completed weeks.
  • Existing medical conditions of the mother-to-be, such as those related to the heart, or diabetes, and blood pressure can lead to premature deliveries. In some cases, consecutive pregnancies with fewer intervals, and IVF can also lead to premature births.
  • Sometimes, severe health conditions and an unhealthy living environment can trigger early delivery too. Poor lifestyle choices such as consuming alcohol, taking drugs, smoking, and stressful and troubled life, like working long hours, being a victim of domestic violence, etc. can also lead to preterm childbirth.

Development of a Baby Born at 36 Weeks

For a baby born at 36 weeks, the average weight is usually around 2.5 to 3 kgs, and the length is around 44 to 49 cms. The fine hair covering the baby’s body while he was inside the womb is on its way out along with the amniotic fluid that keeps the baby safe in the womb. During this time, the chances of your baby having fully matured lungs are 50-50. Some babies are stillborn with immature lungs. The circulatory system and the immunity of your child are at a pretty good stage and can help the baby survive outside the womb. The digestive system is developed to some extent; however, it is yet to mature. The skull also is developed, but not yet fused.

Now you know the development of a baby at 36 weeks can help doctors gauge if the baby will survive or what is needed to help him survive. In the next section, we shall talk about the medical complications of babies born at 36 weeks.

Newborn baby on weighing scale

Complications Associated With Babies Born at 36 Weeks

If your baby’s delivery is 36 weeks premature, some of the complications that they may face are –

1. Regulating Body Temperature

Even at 36 weeks, your baby might not have the necessary amount of fats that are required to be burnt by the body in order to maintain an optimal temperature for growth. This can lead to him being cold, which in worse cases, can cause hypothermia as well. Constant temperature checkups and incubators might be required. 

2. Feeding Problems

The reflex that triggers the actions to suck on the breast and swallow the milk is possibly weaker in premature babies than their full-term counterparts. This can result in the baby going to sleep even when he is hungry. The baby may also not be able to make a sound or suckling action when he wants to have milk. Latching onto the breast can be yet another problem since he won’t be able to suck the nipple as strongly as he needs to. Expressing milk and feeding the baby with the help of a bottle might be necessary. 

3. Breathing Issues

Since the lungs of a preterm baby are not developed completely, your little one could breathe erratically. Another possible breathing complication is the onset of apnea. This is primarily due to an underdeveloped brain that can cause the breathing process to stop for a while without receiving a trigger to continue breathing. 

4. Risk of Infection

Babies usually have a weak immune system. Preterm babies are more susceptible to bacterial attack and illnesses because their bodies are not completely developed. Their low immunity is further compounded by the body’s inability to maintain a certain temperature, making it easy for microbes to infect them. Preterm babies, thus, have a greater risk of infection. 

5. Contracting Jaundice

Most premature babies contract jaundice due to their underdeveloped livers and weak liver function. Infrequent excretion of bilirubin results in its accumulation as the underdeveloped liver cannot filter it out. This leads to jaundice. The most common symptoms of jaundice are yellow skin and eyes. 

6. Patent Ductus Arteriosus

Some preterm babies may also suffer from Patent Ductus Arteriosus, which is a congenital heart defect wherein the ductus arteriosus, a temporary blood vessel, does not close soon after the baby is born. The function of ductus arteriosus is to allow blood to bypass the non-functioning lungs of the foetus. After childbirth, the blood vessel closes and becomes what is scientifically identified as ligamentum arteriosum. 

Newborn baby with jaundice

Premature babies thus need a lot of care after they are born. Let’s take a look at how to care for babies born at 36 weeks.

Does Baby Born at 36 Week Need NICU?

While some babies born before 36 weeks might appear ready to go home, your baby could still require a hospital stay before being safely discharged.

Medical professionals aim to prevent the need for readmission by ensuring your baby receives appropriate care before transitioning home. It’s advisable to prioritize your baby’s current care and feel assured about heading home once both you and your baby are fully prepared.

How to Care for a Premature Baby Born at 36 Weeks?

Caring for a premature baby can be a little different from caring for a healthy, full-term baby. Here are some things you must bear in mind when caring for a preterm baby.

1. Skin-to-Skin Contact

Apart from all the medical procedures and measures you would take to ensure continued support for the health of your preterm baby, creating a strong bond between you and your baby is essential. Having as much skin-to-skin contact as possible lets your baby know that you are taking care of him. Your baby can sense your presence and will love the soothing warmth that your body provides him. This connection also helps the baby calm down and heal faster. 

2. Breastfeeding

Once your doctor deems it fine to let your baby start feeding the usual way, you can start breastfeeding him. This also necessitates that you continue expressing your breast milk even when the baby is not having any initially. Breast milk will further boost your baby’s immunity by providing him with necessary antibodies. If holding your baby and letting him suck on the breast is still a problem, you can choose to feed him using a bottle. Formula-based milk should be used only if you have difficulty producing breast milk. 

What Is the Survival Rate of Babies Born at 36 Weeks?

The survival rate of babies born at 36 weeks is pretty good and hovers around 98% to 99%.


1. Do Babies Born at 36 Weeks Develop Slowly?

Babies born at 35-36 weeks face a 38% higher risk of developmental challenges across cognitive, physical, language, and socio-economic domains. Late preterm infants may experience issues with memory, school performance, and behaviour. Communication and language delays are common risks at 36 weeks, but awareness equips caregivers to provide essential support for better outcomes.

2. What Are the Chances of Having Normal Delivery at 36 Weeks?

There is about a 7% chance of a baby at 36 weeks delivered normally.

Finally, being able to hold your newborn baby is a wonderful feeling, even if he is a little premature. Once the necessary care has been taken to ensure that your baby can breathe well, feed well, and can maintain his body temperature, you can bring him home. You will have to be vigilant when it comes to your preterm baby’s health for a few more months because his body is not as developed as a full-term baby. Nonetheless, the happiness of bringing your child home will be incomparable!


1. Pregnancy – premature labour;;

2. Preterm Labor;;

3. Why Are Babies Born Early?;;

4. Premature Birth;;

5. Long-term health effects of premature birth;;

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