13 Week Old Baby: Three Months In and Finding Their Hands

Your Baby at 13 Weeks Old

A 13 week old baby is just past 3 months — smiling on their own, following faces and objects, bringing hands to the mouth and holding the head steadier, per the Canadian Paediatric Society’s 3-month milestones. Sleep becomes more predictable after 3 months, with a more regular nap schedule emerging, and the peak crying period has usually settled.

Your 13 week old baby has crossed the 3-month mark and is consolidating a whole cluster of new skills — steadier head control, discovered hands, freer smiles, and richer coos. The days often feel a little more predictable now.

This guide covers what to expect this week: the developing hand skills, feeding and sleep as a pattern emerges, and how to keep supporting your sociable baby.

Your Life This Week: The Parent Experience

Thirteen weeks in, many parents feel steadier ground underfoot — the crying has settled, a rough rhythm is forming, and your baby’s growing responsiveness is a real reward. Tiredness lingers, but the days are more navigable.

Use your baby’s brighter awake windows for play and their sleepy stretches for your own rest. Keep leaning on help.

The “baby blues” affect up to 80% of new mothers and usually pass within a few weeks, but postpartum depression can develop later — it affects about 13% of new mothers, and as many as 10% of fathers, and lasts longer, the Canadian Paediatric Society notes. If low mood, anxiety or a sense of disconnection is present now, please tell your doctor or public health nurse. You don’t need to wait and see whether it lifts, and it doesn’t matter how long it’s been going on — postpartum depression can begin any time in the first year. It is treatable, and getting help sooner makes it easier to treat.

Feeding Your 13 Week Old Baby

A 13 week old baby feeds on cue. The Canadian Paediatric Society advises feeding on demand — whenever your baby is hungry. Feeds are often bigger and less frequent now, but there’s wide variation, so follow your baby rather than a clock. For formula, follow the feeding chart on your formula’s packaging. The CPS signs of feeding well still apply: six or more wet diapers a day, a content baby, and steady weight gain.

Distracted feeding is common now that your baby is so interested in the world — a calmer, quieter spot can help. Solids are still a way off: the Canadian Paediatric Society recommends waiting until around 6 months, when breast milk or formula no longer meets all your baby’s needs on its own.

Whether you breastfeed, formula feed or combine the two, your baby’s brain and vision development runs on the right nutrients — DHA, iron and vitamin D among them. If breastfeeding isn’t an option, the Canadian Paediatric Society advises a store-bought, iron-fortified, cow-milk-based infant formula — fortified to provide these — until 9 to 12 months, when whole cow’s milk (3.25% M.F.) can take over, provided your baby is eating iron-rich foods by then.

A note on formula this week. As feeds settle into a rhythm, they’re calm moments to connect with your more interactive baby. MOF’s organic Stage 1 formulas, such as HiPP Dutch Stage 1, are iron-fortified and suitable from birth through 6 months, providing the DHA, iron and vitamin D your baby needs. Formula is a good choice whenever it’s the right one for your family.

Sleep at 13 Weeks: What’s Normal & How to Help

A 13 week old baby is entering the stretch where, the Canadian Paediatric Society notes, sleep habits become more predictable — sometime after 3 months — with a more regular nap schedule emerging. Some babies begin longer overnight stretches, though night waking to feed is still normal.

This is developmentally on track. The shift toward organised sleep tends to come on its own as your baby matures; there’s no need to force it.

Keep reinforcing day and night: bright, active days and calm, dim, quiet nights. Put your baby down drowsy but awake when you can, and use a consistent wind-down routine to support the emerging pattern.

Safe sleep reminder: always place your baby on their back for every sleep, on a firm flat mattress with a tightly fitted sheet and no loose, soft items, in a crib, cradle or bassinet in your room for the first 6 months. Keep starting your baby on their back even once they can roll. Car seats, strollers, carriers, bouncers and swings aren’t safe sleep surfaces — if your baby falls asleep in one, move them to their crib, cradle or bassinet as soon as you can. The Canadian Paediatric Society advises this lowers the risk of SIDS.