The First Year with Twins Week 15 and 16

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Learn what to expect with your infant twins week 15 and 16, including tips, tricks, and advice from real twin parents who have been there.

All content on this website, including medical opinion and any other health-related information, is for informational purposes only and should not be considered to be a specific diagnosis or treatment plan for any individual situation. Use of this site and the information contained herein does not create a doctor-patient relationship. Always seek the direct advice of your own doctor in connection with any questions or issues you may have regarding your own health or the health of others.

Your Twins Week 15 and 16

Welcome back returning twin parents! Hello and welcome to the new twin parents who are just finding us today!

You made it through your first 3 months as a twin parent and you’re now well into your fourth month of twin parenthood. This is a huge accomplishment. Little known secret: we knew you could do it!

Now what? Well, this is a good place to start. We have plenty of information and resources to help you navigate twin parenting with your twins week 15 and 16.

Our twin parenting tips come from our very own experienced twin parents from around the world! These parents have all been there, done that, and are ready to share their tips and tricks with you.

These first months are full of excitement, questions, and even some anxiety. Not to worry, we’ve got your back. We’ve laid out all our best tips, tricks, and advice for twins week 15 and 16.

If you haven’t already, now is a great time to reach out to our twin parent mentorship coordinator. We can connect you with another twin parent who has been right where you are with their own twins. This kind of perspective is invaluable!

Check out our mentorship program here!

16 week old twins
16 week old twins

What to Expect with Twins Week 15 and 16

  • Going back to work soon? Read these back to work tips to get ready.
  • Your twins’ may soon start to flip over. You’ll start to see them rocking from side to side. They will probably flip from front to back first. When you see them starting to roll, begin the transition out of a swaddle and into a sleep sack (wearable blanket). Try the Love to Dream Transition Bag for when they start to roll (buy on Amazon)
  • Your twins may start teething soon. This will cause sleep disruption so prepare with these tips for teething.
  • If you’re noticing more drooling, this common when babies are teething and/or if they have a cold/stuffy nose. It’s nothing to worry about, but if you notice a rash forming use Aquaphor healing ointment (buy on Amazon) to keep it under control.
  • Get ready for that first giggle any day now! Make a fun game of tickling your baby while making a funny sound to get them to laugh with you. This is a fun way to enjoy a little 1-on-1 time with each twin. Right after tummy time is perfect for this!
  • Now is a good time to start putting your babies to sleep “drowsy, but awake”. Lay them to bed on their backs while still awake and leave the room. This will help them start to learn how to self soothe. They will probably cry and want to be picked back up, which is OK — you should do that, then settle them down and try again. Just keep trying and don’t feel defeated if it doesn’t work for a while. Practice is what we’re looking for right now.
  • Your babies can now identify your face, voice, and smell. When they hear you speak or sing, they will know you are just around the corner.
  • Practice tummy time during the daylight hours. By 3 months old, you should be up to 60 minutes of tummy time a day. Break this down into a few times a day after feedings. Read more about tummy time here
  • Keep your babies on a blanket or play mat on the floor as much as possible during the day. Put toys and baby mirrors around them to encourage them to reach out and begin to move.
  • Try to limit using baby containers (bouncy chairs, swings, etc.) for no more than 30 minutes at a time. Learn more about container baby syndrome here.
  • Carrying your twins so they can look over your shoulder encourages them to lift their heads and look around. You will likely have to do this one baby at a time but eventually they will get really good at it and you can try to carry both at once. Tandem baby carriers are great for this and they also let you get more things done around the house.
  • Your twins will by now be putting their fingers into their mouths and trying to grasp objects and bring them to their mouths. Be extra careful about what you leave out within the twins’ reach. Anything that can fit through a toilet paper roll can get lodged in your baby’s throat.
  • Expect to go through 100-125 diapers per week for twins through Week 16. Here’s where you can stock up: buy on Amazon.
  • You’ll probably be doing 6 feedings a day (every 4 hours). Make sure you’re feeding your babies at the same time and putting them down to sleep at the same time to keep them together on a schedule. Learn about bottle-feeding here
  • Babies are eating typically 4 – 6 oz at each feed for twins week 15 and 16, but if your babies are preemies they may be eating less. Ask your pediatrician what is the appropriate amount for your babies based on their weights.
  • You can expect your twins to gain around 6-8 oz each week now. They need sleep in order to grow. Research shows that 80% of growth hormone is secreted during slumber.
  • Start practicing good hygiene to prevent illness but don’t go overboard with the anti-bacterial wipes. Some contact with germs in important for your twins. Baby’s immune system will not be given the opportunity to develop properly without having things to fight. Aim to keep things “clean” rather than “sterile”. This will ensure your home is safe from harmful germs yet suitable to allow their immune systems to develop properly.
  • By now, your twins will be sleeping about 15 hours every day. About 10 of those will be at night and the other 5 hours will be broken into 3 naps during the day. See our feeding and napping schedule below for a sample schedule.
  • Now is a good time to start a bedtime routine. A bath, a book, a feeding, a lullaby, and down to sleep is a great routine. This pattern will cue your babies to learn that “bedtime” is starting. Do the same thing every night and they’ll start to catch on to your cues. Learn more about bedtime routines here.
  • 12 weeks old is the earliest we recommend to start sleep training. We do not recommend trying to sleep train before 12 weeks old. But your twins might not be ready to sleep through the night yet and that’s totally normal. Many parents have success with sleep training around 5-6 months old. Read this article on sleep training.
  • Your babies should be placed to sleep on their backs on a firm, flat surface with only a tightly-fitted crib sheet. No blanket, no toys, no bumpers, no flat sheets. You baby should wear a swaddle blanket or wearable blanket for warmth and comfort. Do not sleep your babies on an inclined surface (learn why here). Following these recommendations will greatly reduce the risk of SIDS and accidental suffocation. Learn more about SIDS here.
  • If you haven’t already started, now is the time to start baby proofing! Once your twins start crawling you will thank us! You’ll want to baby proof every room in your house but each room will need a different variety of babyproofing tools. If you’re not a handy person you may want to hire a professional babyproofer to come in and set you up. Read about making your home more safe here.
  • If you feel like your pelvic floor is “falling out” give your doctor a call. This isn’t very common but you may be suffering from uterine prolapse. Read about uterine prolapse here.
  • If you feel like you still look pregnant, it could be diastasis recti, which is common with twin pregnancies. Read about diastasic recti here.
  • If you haven’t already, look into joining a local moms of multiples club (aka twin club). Read about local twin clubs here
  • If at all possible, now may be a good time to have a trusted adult (or two) stay overnight with the twins so you and your partner can have a little getaway. If you’re lucky to have a nanny, babysitter, or loved one who is familiar with your twins enough to stick to their schedule and they are willing to do an overnight, a night away at a hotel with just you and your partner will do WONDERS for your relationship.
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Common concerns from the moms who have been there with twins week 15 and 16

Milestones & developmental leaps parents have noticed with twins week 15 and 16

What’s going on with development in twins week 15 and 16?

  • One or both of your twins may be showing signs of teething this week. They may be fussy, drooling, and irritable as they begin to cut their first tooth. Check out some of our best teething tips here.
  • Separation anxiety may be ruling your life as your twins enter their next developmental leap around this week.
  • Your twins may be smiling and giggling with a greater frequency this week. They are really starting to pay more attention to their surroundings now!
  • Your twins may begin to roll from front to back this week, although many babies don’t do this until around 4 months. When you notice they are starting to roll you should transition them out of the swaddle and into a sleep sack (this one is great for transitioning)
  • This is the age when many infants begin to recognize repetition. Switch up your day to keep them from getting too bored.
  • Your twins may finally be sleeping for longer stretches. Remember that sleep regression is a temporary part of this developmental leap and it will be over before you know it. Learn about sleep training here.
  • You will probably notice your twins blowing raspberries with their lips and mimicking mouth movements as they learn to manipulate their mouths by watching you.
  • Your twins will start to practice reaching and grasping. Surround your twins with lightweight toys that fit in one hand. Make sure to keep hazards out of reach, such as strings, cords, small items they can choke on, hot drinks/food, etc. Read more about childproofing here.
  • Play clapping games! Your twins will not be able to clap their own hands together until 7-9 months, but you can sing a song and clap their hands together to the music. “Patty Cake” and “If You’re Happy and You Know It” are great for clapping games.
  • You may see (and hear) your twins attempting to mimic sounds you are making at them or making cooing noises, as if they are practicing communication skills. Talk to them often so they can practice.
  • Your twins curiosity has them demanding to sit up and look around more often this week. They may even attempt to sit up on their own, although they don’t have the ability to do it on their own just yet.
  • Your babies may start to notice each other. Don’t worry if they don’t yet, though. It’s a common misconception that newborn twins know they are a twin. They don’t! They are in their own little world and don’t notice their twin is even there for a while. But once they do — look out! Keep your camera handy to capture all the amazing twinnie moments to come!

Challenges you might experience with twins week 15 and 16

There are some challenges to look out for with twins week 15 and 16

twins week 15
15 week old twins

Tips from Parents of Twins Week 15 and 16

Take some tips from experienced twin parents!

  1. Use a sleep sack when you can’t use a swaddle anymore to keep them warm and safe in the crib.
  2. Read to your babies often. They will love it and it will become a habit as they get older.
  3. Find twin mom support in your area or even online – Check out our twin parent mentor program here
  4. Play music for them often. The sound and vibrations will occupy them and soothe them.
  5. Sit them upright for at least 20 minutes after eating to help with gas.
  6. Bottle prep. Especially at night!

Personal Advice from Parents of Twins Week 15 and 16

“When one wakes to feed, wake the other. Increase the amount of milk/formula once they are 10+ lbs. Be open to advice from other moms, but take it with a grain of salt. Track times for feeding/sleeping. Don’t forget tummy time.” Candice L.

“Use musical and light up toys to help make tummy time fun for everyone, read to them and show them the pictures, help them practice holding on to toys and get something musical that can attach to their crib they can play with and be entertained while you are helping their sibling.” Breanna M.

“Rotate one twin in swing and one in bouncer to change it up! Bottles of breastmilk for middle of the night feeds (they sleep longer because you know how much they’re taking in). Accept help when it’s offered and ask for it when you need it. Buy a baby wrap to wear one when both are being fussy. Boppy loungers (buy on Amazon) are a must.” Lauren H.

“You are amazing and you can do so much more than you think you can. If you try something and it doesn’t work out be kind to yourself but again you will be surprised at what you are successful at. Don’t ever limit yourself without trying. I have accomplished so much more that I thought I couldn’t, but so glad I at least attempted.” Hannah S.

“Breathe! When my one twin was fussing during a night feed, we were very stressed and frustrated. It’s okay to be frustrated, and taking a deep breath helps. Use your pediatrician and triage nurse when you aren’t sure. Not Google! Pack and plays are essential (buy on Amazon). My twins are outgrowing their twin bassinets and we have one pack and play and are ordering another so we can follow safe sleep practices. Self care. I just got a massage and feel like a new person and am ready to take on the world of twin parenting again!” Tristan H.

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Questions you might have for your pediatrician about your twins week 15 and 16

The American Academy of Pediatrics (AAP) recommends babies get doctor checkups at birth, 3 to 5 days after birth and then at 1, 2, 4, 6, 9, 12, 15, 18 and 24 months. Reminder that twins = two co-pays for each doctor’s visit.

  • Should we switch to a sleep sack from a swaddle even if they haven’t rolled over yet?
  • What is the best way to sleep train twins?
  • How can I tell if they’re teething?
  • When can we drop the night feeds yet?
  • What milestones should we be on the lookout for now?

You might want these items for your twins week 15 and 16

You might want these items for yourself

  • Twins monthly milestone baby blanket (buy on Amazon)
  • Milestone baby photo cards (buy on Amazon)
  • Self-care items such as makeup, hair products, new clothes, or anything to make you feel human again

Feeding and nap schedule for 4 month old twins

A schedule with twins week 15 and 16 is key! Let’s just say that the importance of scheduling and organization when you are outnumbered by twins simply cannot be overstated now that the twins are becoming more alert and demanding of your time and attention.

Here is a feeding and nap schedule for twins week 15 and 16 (almost 4 months old). You can see that adding tummy time before each nap is a good way to ensure they are getting enough of it throughout the day.

  • 7:00 – Wake up time! First feeding of the day
  • 8:00 – Tummy time and play
  • 8:30 – Nap
  • 10:00 – Wake up and feeding
  • 11:00 – Tummy time and play
  • 11:30 – Nap
  • 1:00 – Wake up and feeding
  • 2:00 – Tummy time and play
  • 2:30 – Nap
  • 3:30 – Wake up
  • 4:00 – Feeding
  • 4:30 – Optional short nap
  • 5:00 – Wake up
  • 6:00 – Feeding
  • 6:30 – Bedtime
  • 9:00 or 10:00 – Dream feed (a quick feeding while the babies are barely awake)
  • Feed once or twice overnight when the first baby wakes and cries to eat. Feed both babies and get them back down to sleep ASAP.

The trick here is to stick to the schedule as best you can. Things will happen to break your routine. That’s okay. Just get back to it asap. The quicker you can get back on track, the easier it will be on you and your twins.

Do everything in your power to feed your twins together to make sure you get breaks. If they are on opposite feeding schedules, you will never get a break — and you deserve one!

Sleep advice from The Sleep Lady

If you’re beginning to feel like your twins may never get the hang of consistently sleeping through the night and napping reliably, you aren’t alone. We can assure you that eventually things really DO get better in the sleep department. Even with twins!

There are some things you can do to help get some more shut eye for you and your twins, and ensure some good sleep patterns for you to enjoy for years to come. Being aware of what is coming can help you not only prepare, but get through it. Sleep regression is real.

The Sleep Lady, Kim West, LCSW-C says: “Babies may experience sleep regressions starting around 3 to 4 months, again at 8 to 10 months, 12 months, at 18 months, and again at 2 years; the most common sleep regressions occur at 6 weeks, 4 months, and 6 months. It is fairly uncommon for a baby or toddler to have a full-blown sleep regression with every developmental milestone.”

See more of what The Sleep Lady Recommends about your newborn twins’ sleep here.

When to call the doctor 

It’s better to overreact 100% of the time than to underreact once.

Natalie Diaz, Twiniversity Founder and Mom of Twins

All content on this website, including medical opinion and any other health-related information, is for informational purposes only and should not be considered to be a specific diagnosis or treatment plan for any individual situation. Use of this site and the information contained herein does not create a doctor-patient relationship. Always seek the direct advice of your own doctor in connection with any questions or issues you may have regarding your own health or the health of others.

When it comes to calling your doctor or seeking medical advice, you have to learn to trust yourself. No one knows your babies like you do and if you feel something isn’t right, it probably isn’t. When in doubt, call. A good pediatrician will NEVER make you feel stupid for being concerned about your twins well-being. Remember that and hire and fire accordingly.

That being said, there are a few guidelines to follow.  There are a few circumstances under which you should call your doctor and get medical advice, or even call 911.  When you call you should have a pen and paper handy and be prepared to give the following information over the phone:

  • Immunization records
  • Any medications, dosages, and times last taken (even over the counter drugs)
  • Medical history
  • Your baby’s temperature
  • Mention that the baby is a twin, in case of a contagious illness
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Any time you see the following symptoms with your twins you should contact your pediatrician immediately.

  • Blood in vomit 
  • Blood in stool
  • Seizure
  • Suspected poisoning
  • Bleeding you cannot stop
  • Unable to move
  • Limpness
  • A rectal temperature of 100.4 or above
  • Sleeps more than usual or will not wake up
  • Yellow skin or eyes

Call your doctor as soon as possible if one or both of your twins experiences any of the following.

  • Refusal to eat for multiple feedings in a row
  • Diarrhea or vomiting 
  • A cold that will not resolve itself or gets worse
  • Unexplained rash
  • Signs of dehydration (no tears, no wet diapers, sunken eyes, sunken soft spot)
  • Ear drainage
  • Will not stop crying

When to call 911

Please note that when you call 911, you and your baby will be taken to the nearest emergency room. This may or may not be located at your preferred hospital.

  • Your baby is turning blue or taking more than 60 breaths per minute
  • Your baby has a seizure which lasts more than 3 minutes or you cannot reach their doctor by phone immediately
  • Suffers from convulsions, unconsciousness, or irregular breathing following a fall or from bleeding
  • You think your baby may have a skull, neck, back, or pelvic fracture (DON’T move your baby)
  • Your baby suffers from a compound fracture where bone is sticking out from the skin (cover it with a clean cloth and do not touch it)
  • Your baby has bleeding you cannot stop after applying pressure for 10 minutes

Again, learn to trust your gut.  When in doubt, call and see what your doctor thinks.  That’s what they’re there for.

What you should read for twins week 15 and 16

Don’t forget to do these things with twins week 15 and 16

You probably feel like you’re starting to get your bearings with twins week 15 and 16. At the very least, you are probably beginning to settle into chaos as your normal. It’s getting a little better each week with regards to sleep and routine. Good news is that it will continue to get better each week! We have put together a short list of a few things to remember that might help you out a bit.

  • Use your phone or a notepad to track milestones. You will never be able to remember who got which tooth first and later is a relative term. Track it when you can and compile it all in a book later.
  • Put on your own oxygen mask first! Take care of yourself! Eat well, drink water, rest when you can, and try and take 10 minutes for yourself everyday.
  • Keep in close communication with your pediatrician. Keep a running list of questions or concerns to bring up at the next appointment so you don’t forget. If you don’t write it down, you WILL forget it. Call the office anytime to ask more pressing questions.
  • Teamwork makes the dream work! Burn out happens faster than you might think with twins! When it becomes too much, lean on your partner, a family member, or friend and tag them in for a bit. If you have support, let them support you.
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To Sleep Train, Perchance to Dream  

Sleep training is a controversial topic among parents.  In case you are unfamiliar with this term, sleep training essentially means teaching your children how to comfort themselves so that they can put themselves to sleep.  This means that you do not rock, nurse, sing, or bounce your babies to sleep, but instead put them in their cribs awake and let them learn how to fall asleep themselves.  Dr. Richard Ferber first popularized this concept, and so some people call it “Ferberizing” your babies.  Another term for this method is, “cry it out,” because, yes, there will be some crying involved.  

But when you use these methods, you are not really training your babies to “sleep,” but rather to soothe themselves.  When babies are very little, their brains literally aren’t developed enough for them to soothe themselves.  They need help settling down to sleep, and you will instinctively find yourself rocking, singing, or nursing your babies to sleep.  But it becomes much more difficult to settle your babies down the line at 3 and 4 months when they are heavier, alert, and more easily distracted

Photos of Twins Week 15 and 16

Return to the First Year with Twins Home

Sources

Dr. Ilona Bendefy, Baby: Day by Day

Dr. Frans X. Plooij and Dr. Hetty van de Rijt, The Wonder Weeks

Marple, Kate, and Dawn Rosenberg. “When to Call 911: How to Tell If Your Baby Needs Emergency Care.” BabyCenter https://www.babycenter.com/0_when-to-call-911-how-to-tell-if-your-baby-needs-emergency-ca_10348508.bc

“Newborn Baby: When to Call the Doctor.” Cleveland Clinic, https://my.clevelandclinic.org/health/articles/9692-newborn-baby-when-to-call-the-doctor

“Developmental Milestones: 3 Month.” HealthyChildren.org, https://healthychildren.org/English/ages-stages/baby/Pages/Developmental-Milestones-3-Months.aspx

“Physical Appearance and Growth: 4 to 7 Months.” HealthyChildren.org, https://healthychildren.org/English/ages-stages/baby/Pages/Physical-Appearance-and-Growth-4-to-7-Months.aspx

WhattoExpect.com “4-Month-Old Baby.” What to Expect, 2 Aug. 2019, https://www.whattoexpect.com/first-year/month-by-month/month-4.aspx

“How Often and How Much Should Your Baby Eat?” HealthyChildren.org, https://www.healthychildren.org/English/ages-stages/baby/feeding-nutrition/Pages/How-Often-and-How-Much-Should-Your-Baby-Eat.aspx.

“How Much and How Often to Feed Infant Formula?” CDC.org, https://www.cdc.gov/nutrition/infantandtoddlernutrition/formula-feeding/how-much-how-often.html

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