I’ve seen lots of sleep training threads recently, and I’m finding it pretty upsetting TBH. The evidence strongly suggests that sleep training causes your baby to remain in a high stress state - they haven’t ‘self settled’, they have just learned not to cry as no one will come. Salivary cortisol (stress hormone) samples showed that cortisol levels were as elevated when baby was crying and when they had ‘settled’/gone quiet.
Studies also suggest that sleep training has no long-term effects - toddlers and older children that were sleep trained have no better sleep patterns than those who weren’t.
And most of all - night waking is NORMAL for babies! They are not designed to sleep for long periods without parental input, and frequent waking is in fact a safety mechanism that helps to prevent SIDS.
So, before you consider sleep training, please read the evidence, and consider other ways of managing your baby’s sleep. Would co-sleeping work better for you? Do you have a partner who could tag team with you for wake-ups? Can you sleep in the evening to allow you to wake in the night without being too knackered?
A good read for evidence summary - sarahockwell-smith.com/2015/05/14/ten-reasons-to-not-sleep-train-your-baby/