Short answer: The “fourth trimester” is the first weeks after birth, when your body recovers, your hormones shift and you get to know your baby. Bleeding for a few weeks, cramps while feeding, night sweats, sore stitches, tearfulness and exhaustion are all common. What helps: rest, accepting practical help, limiting visitors, eating well and getting outside a little each day. Get help straight away for heavy bleeding, fever, calf or chest pain, a severe headache or vision changes, or thoughts that frighten you.
You're home. The visitors have been, and there you sit — with a person you've known for less than a week and a body that doesn't quite feel like yours. Everyone prepares you for the birth. Far fewer people tell you what comes next.
What your body is doing
- Bleeding (lochia): heavy at first, then gradually turning brownish and lighter over a few weeks until it stops. It can get redder and heavier while you breastfeed, because feeding makes your womb contract. Use pads, not tampons, until after your six-week check.
- Cramps: period-like pains while feeding are your womb shrinking back. They're often stronger after a second or later baby.
- Stitches and soreness: wash with plain warm water daily and pat dry. Tell your midwife if stitches are very sore, smell unpleasant or you find it hard to pee.
- Bowels and bladder: your first poo may take a few days; drink plenty and eat fibre. Leaking a little urine when you laugh or cough is common — pelvic floor exercises help.
- Night sweats are common in the first weeks as your body adjusts.
- Breasts: they often become full and tender around day three or four as milk comes in.
What your hormones and mood are doing
After birth, hormone levels change rapidly. Feeling down, tearful, anxious or irritable for a few days is very common — the “baby blues” — and usually passes within two weeks. If low mood lasts longer, gets heavier, or you struggle to enjoy anything, talk to your midwife, health visitor or GP. That isn't making a fuss; it's exactly what they're there for. See postnatal depression vs baby blues.
You don't have to enjoy every minute. You've just given birth and you're sleeping in two-hour blocks. Getting through it is a perfectly good goal right now.
What happens in your head
You're on high alert
Every sigh wakes you. You check your baby is breathing. That heightened alertness is common in the early weeks and usually settles as your confidence grows. If worry takes over your days, mention it.
Time blurs
Days run into each other. With broken sleep, that's normal.
Love may come slowly
Some parents feel an instant rush of love; others take weeks. Both are normal. Bonding is a process, not a lightning bolt. See bonding in the first weeks.
What genuinely helps
- Say yes to specific help. “Call if you need anything” does little. “I'll drop a meal round on Thursday” does a lot. Ask people for the second kind.
- Limit visitors. You don't have to host anyone.
- Rest when you can, and share nights if you have a partner.
- Eat and drink well, especially if you're breastfeeding. This isn't the time for a diet.
- Get outside each day, even briefly. Daylight and a short walk help mood and sleep.
- Start gentle pelvic floor exercises when you feel ready.
Your postnatal check
In the UK, you should be offered a postnatal check with your GP around six to eight weeks after birth to see how you're recovering physically and emotionally. It's a good moment to raise anything you're unsure about — including mood, pain, bladder or bowel problems, sex and contraception. You can get pregnant again as soon as three weeks after birth, even if you're breastfeeding.
When to get help straight away
Tell your midwife, health visitor or GP immediately, or call 999 (UK), 911 (US) or 112 (EU) in an emergency, if you have:
- sudden or very heavy bleeding, large clots, feeling faint or a racing heartbeat;
- a high temperature with a sore, tender tummy;
- pain, swelling or redness in one calf;
- chest pain or difficulty breathing;
- a severe headache, changes in your vision or vomiting;
- thoughts of harming yourself or your baby, or sudden confusion or very unusual thoughts.
The fourth trimester lasts about six weeks on paper. In real life it often takes longer. Be as patient with yourself as you are with your baby.
Related reading
For the first twelve weeks: The Fourth Trimester (PDF, English) covers the first twelve weeks with your baby — and with the new you.
Sources
- NHS — Your body after the birth.
- NHS — Your 6-week postnatal check.
- NHS — Postnatal depression.
Written by the Bloom Guides editorial team. Last updated: 20 October 2026. General information only — not a substitute for advice from your midwife, health visitor or doctor.