At birth, ⅓ (or more) of your baby’s blood is still in the placenta. That means if you immediately cut the cord, your baby is missing A LOT of blood.

If you were missing ⅓ (33%) of your blood, your heart and respiratory rates would increase, your blood pressure would drop, and you would become anxious and confused. If you lost 40% of your blood, all those symptoms would be worse and you would become lethargic.

If you lost more than 40% you would die.

So how long should you wait after birth to clamp the cord?

Ideally you would “wait for white”. This means the cord isn’t clamped until it has stopped pulsing and turned white because all of the blood is now inside the baby. This is usually over 5 minutes (I’ve waited until the birth of the placenta with my two homebirths [about an hour]).

But delaying cord clamping for even 60 seconds has been shown to have benefits including:

Increased hemoglobin
Increased iron
Increased blood pressure (early clamping means BP can be too low)
Increased urinary output
Increased body temperature (early clamping babies are colder)

If baby is having a slower transition to breathing outside the womb upon their birth, keeping them attached to the cord will also continue to provide them with oxygen until they begin breathing on their own.