Chorevia

Day 83 of 120 · Week 12

Twelve weeks

Last reviewed · 3 min read · 13 sources · Plain-text version

Colic is usually gone by three months. A baby who finds their own hands to calm down, why that's a skill and not a habit, and twelve weeks of you.

A Black mother watches from an armchair in soft morning light as her twelve-week-old, on their back on a floor blanket, sucks on their own fist with eyes half closed.

Twelve weeks. Somewhere in the last fortnight, the house probably got quieter.

Heart

Across 28 diary studies of 8,690 babies, fussing and crying averaged about 2 hours a day for the first 6 weeks, then dropped to about 68 minutes by 10 to 12 weeks. Colic fell from 17% to 25% of babies in the first 6 weeks to 0.6% at 10 to 12 weeks (Wolke et al., 2017). The AAP says colic is usually gone by 3 months, sometimes 4 (AAP). If your evenings are still hard, you're not outside the normal range yet, and you're still allowed to call.

Head

Part of what changed is your baby. As babies gain control of their arms, their hands find their mouth, and sucking can become a way to calm down (AAP). Bringing hands to mouth is a 4-month milestone (CDC). It's not a habit to worry about: thumb or finger sucking only becomes a concern for teeth if it continues strongly past 2 to 4 years (AAP). The lesson of the month, in the guide's words: "I can calm myself, a little."

Body

Hand to mouth isn't always comfort. Repeatedly bringing a hand to the mouth can mean hunger, though babies also suck for comfort, so check the timing of the last feed (Jain & Bunik, AAP). A pacifier is the other kind of sucking: offer one for sleep if your baby takes it, since it lowers SIDS risk (Moon, AAP), and never tie it to the crib or around your baby's neck or hand (AAP).

Try today

  1. Close in on the baby on the blanket bringing both open hands to the mouth, the mother's hand resting still on the blanket's edge a few inches away.

    Hands to mouth, on purpose

    Time: 1 minute, at the first fuss · What to teach in the guide

    1. At the first grizzle, when your baby is fed and dry, wait: count slowly to ten before you move.

    2. Watch the hands. If one heads for the mouth, let it land, and stay quiet.

    3. If it isn't working after a minute, or the fuss is climbing, step in the way you always do: pick up, rock, offer a feed (AAP).

    4. Later, during a diaper change, bring their hands gently to their mouth so they feel the path.

    Make it work:

    This is a minute, not a method. You can't spoil a baby this age by picking them up, and babies whose cries are answered cry less overall (AAP).

Watch for

  • Normal

    about an hour of fussing and crying a day by 10 to 12 weeks (Wolke et al., 2017).

    Call your pediatrician within a day

    if you're worn out from the crying (AAP).

  • Normal

    hand sucking between feeds, often as self-soothing (AAP).

    Call your pediatrician right away

    for a new weak suck or poor feeding (Nationwide Children's).

  • Normal

    a flushed face after a hard cry in a warm room; sweating, a hot chest, or flushed skin means too warm, so dress your baby in only one more layer than you're wearing (Moon, AAP).

    Call your pediatrician immediately

    for a rectal temperature of 100.4°F (38°C) or higher at 3 months or younger, even if your baby seems fine; a rectal reading is the most reliable at this age (AAP).

For you

The mother on the phone at a sunny window, a paper calendar on the sill, the baby asleep on their back in a bare bassinet behind her.

Twelve weeks of you. ACOG recommends a full postpartum visit no later than 12 weeks after birth, covering mood, sleep, recovery, contraception, and chronic conditions (ACOG, 2018). If it hasn't happened, today is the deadline, and a late visit is still a visit: call and book it. Whoever you see, tell them you were pregnant within the last year (CDC).

Bring the whole list, not the polite version: bleeding, pain, sex, contraception, sleep, mood. If sadness has lasted more than two weeks, go to the doctor now; don't wait for the postpartum visit (OWH).

If you're the partner: if the phone call is the hard part, make it for her. Then take the baby to the appointment or keep them home, whichever she wants.

Sources

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

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