Sleep training twins follows the same core principles as sleep training a single baby, but with extra logistics: syncing two schedules, deciding whether to keep them in the same room, and handling the reality that one crying baby can wake the other. Most families can start between 4 and 6 months of age, when babies are developmentally ready to learn to fall asleep independently. If your twins were born premature, use their adjusted age rather than their birth date to gauge readiness.
When Twins Are Ready to Sleep Train
Full-term twins (born at or after 37 weeks) are typically ready for sleep training between 4 and 6 months old. At this age, most babies can go longer stretches without feeding overnight and are neurologically capable of learning to self-soothe. Starting before 4 months usually backfires because the brain simply isn’t there yet.
Since about 60% of twins arrive before 37 weeks, adjusted age matters. To calculate it, subtract the number of weeks your babies were born early from their actual age. So twins born at 32 weeks who are now 5 months old have an adjusted age of roughly 3 months, which means they’re not quite ready. This correction is especially important in the first two years. After age 2, prematurity rarely has a significant impact on developmental milestones.
Beyond age, look for a few practical signs of readiness: your babies can roll from back to tummy, they’ve outgrown the startle reflex that used to jolt them awake, and they’re gaining weight steadily. Your pediatrician can confirm there’s no medical reason to delay.
Same Room or Separate Rooms
This is the first big decision twin parents face, and there’s no single right answer. Many families worry that one baby’s crying will wake the other during training. In practice, babies are surprisingly adaptable to their sibling’s noise, especially if they’ve shared a room since birth. But during the first week of active sleep training, when crying tends to peak, temporarily separating them can make things smoother.
Some sleep consultants recommend moving one twin into your bedroom or another space for the first five to seven days while both babies learn the new routine. Once they’ve started falling asleep more independently, you move them back together. Other experts suggest training them in the same room from the start, reasoning that if they’ll ultimately share the space, they need to adjust to each other’s sounds sooner rather than later. Either approach works. If you don’t have an extra room, don’t stress. Train them together and expect a few rough nights.
One important safety note: the American Academy of Pediatrics recommends that each twin sleep in their own separate sleep space. That means separate cribs or bassinets with firm, flat mattresses and fitted sheets. No crib sharing, no loose blankets, pillows, or stuffed animals. Place each baby on their back. While some parents have heard that “cobedding” (sharing a crib) helps twins sleep longer or sync their schedules, the evidence for those claims is weak, and the AAP advises against it due to SIDS risk factors that apply to multiples.
Sync Their Schedules First
Sleep training is dramatically easier when both twins are on the same feeding and nap schedule. The single most effective strategy is simple: when one twin wakes to eat, wake the other and feed them at the same time. Yes, it feels wrong to wake a sleeping baby. But the alternative is a brutal relay where you finish feeding one, fall asleep, and immediately get woken by the second hungry baby.
The sleeping twin may not eat as much as the one who woke up hungry, and that’s fine. They’ll usually take enough to hold them until the next feeding. Start the clock for the next feed based on when you began the last one, not when each baby finished. Because twins are often different sizes, they’ll eat different amounts and finish at different times. That’s normal. The goal is synchronized start times, not identical appetites.
Once feedings are synced, naps and bedtime tend to fall into place naturally. Within a few days, you’ll notice both babies getting sleepy around the same times. This synchronized rhythm is what makes sleep training two babies at once actually manageable.
Choosing a Sleep Training Method
The same methods used for singletons work for twins. The most common approaches fall into three categories.
Graduated Check-Ins (Ferber Method)
You put both babies down awake, leave the room, and return at increasing intervals to briefly reassure them without picking them up. A typical pattern might be checking at 3 minutes, then 5, then 10, then every 10 minutes until they fall asleep. Each night, you stretch the intervals slightly longer. Most babies show significant improvement within three to five nights.
With twins, you check on whichever baby is crying. If both are crying, go to the more upset one first, offer a quick pat or verbal reassurance, then move to the other. Keep visits short (under a minute) so you don’t become part of the falling-asleep process. If you’re applying this method with both babies in the same room, expect that one baby’s crying may reset the other. This is temporary. Consistency matters more than perfection in the early nights.
Chair Method
You sit in a chair between both cribs while the babies fall asleep. Every few nights, you move the chair farther from the cribs until you’re eventually outside the room. This is gentler but slower, often taking one to two weeks. It works well for parents who find it too stressful to leave the room entirely.
Full Extinction
You put babies down and don’t return until a set feeding time or morning. This is the fastest method (often effective within two to three nights) but the hardest emotionally, and with twins, the crying can feel overwhelming. Some parents choose this approach precisely because the short timeline means less total disruption.
No method is objectively better. Pick the one you can stick with consistently. The biggest predictor of success isn’t which method you use; it’s whether you apply it the same way every single night.
The Bedtime Routine
A consistent pre-sleep routine signals to both babies that sleep is coming. Keep it short (15 to 20 minutes) and identical each night: a feed, a diaper change, a sleep sack, maybe a short book or song, then into the crib awake. The “awake” part is critical. If babies fall asleep while being rocked or fed, they haven’t learned to bridge the gap between wakefulness and sleep on their own.
You can do the routine simultaneously if you have a second caregiver, or stagger it by a few minutes if you’re solo. Some solo parents feed both babies at the same time using a twin nursing pillow or propped bottles, then do pajamas and sleep sacks one at a time, placing the first baby in the crib while prepping the second. It’s not seamless, and it doesn’t need to be.
Using White Noise Strategically
A white noise machine near each crib serves two purposes: it helps each baby fall asleep and it masks the sound of the other baby crying. Place one machine between or near each crib rather than relying on a single one for the whole room. Keep the volume at a moderate level, roughly the loudness of a running shower, and position it at least a few feet from each baby’s head. White noise won’t eliminate every cross-wake, but it meaningfully reduces how often one twin’s fussing pulls the other out of sleep.
Handling Sleep Regressions
Twins are individuals with different temperaments and neurological timelines, so they won’t necessarily hit sleep regressions at the same time. One twin might suddenly start waking at the 4-month regression while the other sleeps through it entirely. A few weeks later, the roles may reverse.
The key principle during regressions is to protect the schedule. Continue putting both babies to bed at the same time, even if only one is struggling. If one twin wakes early from a nap, keep them in the crib until the scheduled wake time or wake the second twin within 30 minutes of the first so the schedule doesn’t drift apart. Regressions typically last two to four weeks. If you stay consistent with your sleep training approach during this stretch, most babies return to their baseline without needing to retrain from scratch.
If one twin’s frequent waking is consistently disrupting the other, this is a good time to temporarily separate them for naps or nighttime. Move the regressing baby to another space, maintain the same routine, and reunite them once the rough patch passes.
What to Expect in the First Week
Nights one through three are the hardest. Expect 30 to 60 minutes of crying at bedtime, with one twin often setting off the other. By night four or five, most babies cut their crying time in half. By the end of the second week, many twin pairs are falling asleep within 10 to 15 minutes of being placed in their cribs.
Naps are harder to train than nighttime sleep because the biological drive to sleep is weaker during the day. Apply the same method you use at bedtime for naps, but give it a cap: if a baby hasn’t fallen asleep after 30 to 45 minutes of trying, get them up and try again at the next nap window. Nap training often lags nighttime progress by a week or two.
Progress isn’t perfectly linear. You’ll have a great night followed by a terrible one. One twin will “get it” before the other. This is normal and doesn’t mean the training isn’t working. The overall trend across a two-week window matters far more than any single night.