Pregnancy comes with a mountain of advice: what to eat, what to pack, how to breathe through contractions. And then the baby arrives, everyone turns their attention to the newborn, and many new parents find themselves in a strange, foggy, emotional landscape that nobody really prepared them for.

The first three months after birth are often called the “fourth trimester”. It’s a period of enormous physical, emotional and psychological change — for the baby, and just as much for the people caring for them. If you’re in it right now and finding it harder than you expected, you’re far from alone.

What the fourth trimester actually is

The term was popularised by paediatrician Harvey Karp to describe how newborns are still adjusting to life outside the womb. But it applies equally to parents. Your body is recovering from pregnancy and birth. Your hormones are shifting dramatically. Your sleep is fragmented. And your entire identity is being quietly rearranged.

All of that is happening at the same time as you’re learning to care for a tiny person who can’t tell you what they need. It’s a lot. It’s supposed to feel like a lot.

The things nobody mentions

Most people know about sleepless nights. Fewer talk openly about the rest of it:

• Sleep deprivation changes everything. Broken sleep affects mood, memory, patience and how threatening the world seems. Feeling teary, irritable or foggy is often as much about sleep as anything else.

• Your identity shifts. You might grieve aspects of your old life — spontaneity, work, your body, time with your partner — even while loving your baby deeply. Both can be true at once.

• Intrusive thoughts are common. Sudden, vivid images of something bad happening to the baby affect a large majority of new parents. They’re distressing precisely because they’re the opposite of what you want. Having them doesn’t mean you’ll act on them.

• Relationships change. Couples often argue more in the first year as they renegotiate roles, chores and time. Friendships can shift too.

• Bonding isn’t always instant. For many parents, love grows gradually over weeks or months rather than arriving in a rush at birth.

“You can love your baby completely and still miss the person you were before.”

Baby blues or something more?

In the first two weeks after birth, up to 80% of people experience the “baby blues”: tearfulness, mood swings, anxiety and feeling overwhelmed. This is linked to rapid hormonal changes and usually settles by itself within a fortnight.

Perinatal mood and anxiety disorders are different. They affect around one in five birthing parents — and around one in ten partners — and they can begin any time during pregnancy or in the first year after birth. Signs to look out for include:

• Low mood, hopelessness or emptiness that lasts longer than two weeks.

• Constant worry, racing thoughts or panic attacks.

• Feeling disconnected from your baby or unable to enjoy anything.

• Intrusive thoughts that feel overwhelming or that you can’t stop checking or avoiding.

• Difficulty sleeping even when the baby is asleep.

• Thoughts of harming yourself, or feeling that your family would be better off without you.

These conditions are common, they are not your fault, and they are very treatable. Reaching out early makes a real difference.

Small things that help

You don’t need to do everything perfectly to get through the fourth trimester. A few gentle principles can make it more manageable:

1. Protect sleep where you can. Take shifts with a partner or support person so each of you gets one longer stretch of sleep. Even four hours in a row can transform how you feel.

2. Lower the bar. The house can be messy. Dinner can be toast. This season is about survival and connection, not productivity.

3. Accept help — specifically. When people offer to help, say yes, and be concrete: “Could you bring a meal on Thursday?” or “Could you hold the baby while I shower?”

4. Get outside daily. A short walk with the pram, even around the block, offers daylight, movement and a change of scene.

5. Find your people. Parent groups, online communities or a single friend who’s been there can make you feel far less alone.

For partners and support people

If you’re supporting a new parent, some of the most helpful things you can do are practical: take night feeds where possible, handle meals and household tasks, and guard their rest. Emotionally, ask open questions — “How are you really doing?” — and listen without rushing to reassure. And keep an eye on your own wellbeing too; partners can experience postnatal depression and anxiety as well.

Where to get support

If you recognise yourself in any of the warning signs above, please talk to your doctor, midwife or a therapist who specialises in perinatal mental health. You can also call or text the National Maternal Mental Health Hotline at 1-833-852-6262, which is free, confidential and available 24/7, or contact Postpartum Support International at 1-800-944-4773.

If you ever have thoughts of harming yourself or your baby, call or text 988 or go to your nearest emergency department straight away.

The fourth trimester is a season, not a forever. With rest, support and a lot of self-compassion, most parents find their footing — and you deserve care while you find yours.