Medically the evaluation by Debra Sullivan, Ph.D., MSN, R.N., CNE, COI — written by Kristeen Cherney top top June 28, 2019


You are watching: How does a fetus get rid of its waste products

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Let’s be honest: infant poop is an unfortunate component of parenting, and chances are, you’ll uncover yourself exposed to it and other human body fluids in much more ways than you’d like after baby arrives (looking at you diaper blowouts). Yet what happens v baby’s rubbish while lock snuggled up in your womb?

As babies build in the uterus, they begin to adopt some of the attributes they’ll execute after birth, such as peeing. Most babies execute not poop till after they room born, so chances are, friend won’t have to worry around being exposed to infant poo till after their arrival.

However, pre-birth poo is possible, and also it deserve to lead to complications that should be addressed best away.

Keep analysis to learn much more about her baby during their time in your womb, and what happens if baby does do a number two before their birth.


The scoop on infant poop


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During the numerous months that your baby grows in the womb, they’ll take it in nutrients and expel wastes. But in many cases, this waste is no in the form of feces.

When her baby poops because that the first time, lock emit a waste called meconium. This usually happens after bear — sometimes practically immediately after! Meconium is a dark greenish-black stool that looks choose tar. If friend breastfeed, you’re most likely to continue seeing meconium for a couple of days ~ birth.

Your baby produces this garbage product in your intestines shortly before birth. In part cases, however, complications have the right to arise and your baby will produce meconium if they’re still in the womb. The waste deserve to then collect in the amniotic fluid.

So what happens to rubbish then?

Babies in the womb need assistance gaining nutrients, and also removing waste products. Your placenta is the an essential to making every these attributes happen.

The placenta is made up of cells that are developed in solution to pregnancy. That eventually associated with the umbilical cord, i beg your pardon is thought about your baby’s lifeline, together it’s the method you transport nutrients and oxygen come them.

Through the placenta, your baby will additionally deposit waste products that you carry out the your own body. So, yes no poop or to pee floating about your womb because that the entire nine months.

The placenta is delivered after her baby.


While not the norm, it is possible for infant to happen meconium prior to birth. This have the right to lead to a problem known as meconium aspiration syndrome (MAS). MAS happens once a newborn baby accidentally breathes in meconium-stained amniotic fluids.

MAS is a serious, however treatable, condition that wake up in around 13 percent of live births. The meconium in the amniotic fluid can come to be a problem because these particles can acquire blocked in her baby’s airways and deprive lock of oxygen.

Your physician may be able to detect MAS if your baby isn’t breathing typically at birth. Medical care providers top top hand at the bear will occupational to settle this kind of respiratory distress.

Your baby’s airways will certainly be suctioned to assist remove meconium-filled fluids. Supplemental oxygen might be essential in some cases. Left untreated, MAS may result in pneumonia.

What causes MAS?

There are many feasible risk factors for MAS. Fetal distress is one well-known contributor. If there space complications with placenta or umbilical cord, her baby may not get adequate oxygen or blood supply, and also this can cause distress and also the baby to happen meconium.

MAS is also most usual in babies born at term or slightly after (between 37 and also 42 weeks), yet not in preemies. When the remove of fetal wastes in the womb doesn’t typical your baby will develop MAS, that still critical condition to be aware of.