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Why does SIDS peak at 2-4 months?

The packet we got from our pediatrician says that SIDS is (almost) unheard of in the first month of life, peaks at 2-4 months, then drops dramatically after 6 months, and is more common during cold months. Why would it peak from 2-4 months? Lost immunity from Mom? Such a terrible thing to have on my mind :(

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Rolling over, suffocation? Just a guess. I don't know the answer :)


Not sure but I wondered the same thing when I read that. I had assumed it would decrease as each week went by and was very disappointed when I read about this peak period. It is scary..... my little one just turned two months today.

Snow bunny
I don't think they know what really causes SIDS. Increased risk are online that may help.
Snow bunny
Someone my mom knows had a baby die of SIDS this past January. They don't know exactly what caused it she was sleeping with baby in her bed and woke up and baby had passed away. She did smoke pg and still did but not around the baby. Very sad... Breaks my heart.

Mine turns 2 months in a week :/ Natural for us to worry I'm sure, I just hate it. I feel like when we first brought him home and I was constantly making sure he was breathing.

Risk increases because its sleep related and babies start sleeping longer at night. It's thought that sids is related to a baby's inability to wake up and breathe.

Does anyone know if you can resuscitate if it's caught right away? This might be a silly question. We have a movement monitor that goes off it no movement/breathing is happening.


Did you take an infant CPR class? I highly recommend it.


I may be wrong but from what I have read and understand SIDS happens when baby takes a pause in breathing (which is normal) but the pause becomes too long and baby dies. If you have a movement monitor and you pick baby up when the alarm sounds it will wake baby up and he/she will be startled and resume breathing.