Medically reviewed content. Last updated: April 2026.
Medically reviewed content. Last updated: April 2026.
The first 12 weeks after birth are sometimes called the fourth trimester, a period of enormous adjustment for both you and your baby. Your body is recovering from pregnancy and birth, your hormones are shifting dramatically, and you are learning to care for a newborn on very little sleep. This guide covers what to expect physically and emotionally, and where to find support.
The fourth trimester refers to the first three months after birth. The idea is that newborns are still adjusting to life outside the womb, and parents are adjusting to life with a new baby. It is a period of profound change that deserves the same attention and preparation as pregnancy itself.
During this time, your baby is adapting to regulating their own temperature, feeding, and sleeping patterns. Meanwhile, your body is healing from birth, your hormones are recalibrating, and you are navigating a completely new identity. Understanding what is normal during this phase can help you feel more prepared and less alone.
After birth, you will have vaginal bleeding regardless of whether you had a vaginal or caesarean delivery. This is called lochia and is your body shedding the lining of the uterus. It is typically heavy and bright red for the first few days, then gradually becomes lighter in colour and flow over the following four to six weeks. Use maternity pads rather than tampons during this time to reduce the risk of infection.
Contact your midwife or GP if the bleeding becomes heavier after initially easing, contains large clots (bigger than a 50p coin), or smells unpleasant.
Your uterus contracts back to its pre-pregnancy size over the first six weeks, a process called involution. These contractions can feel like period cramps and are often stronger during breastfeeding, as the hormone oxytocin triggers both milk let-down and uterine contractions. Afterpains tend to be more noticeable with second and subsequent babies. Paracetamol and ibuprofen are safe to take for relief if you are breastfeeding.
If you had a vaginal delivery, your perineum (the area between your vagina and anus) may be sore, swollen, or stitched. Most stitches dissolve within two to four weeks. To ease discomfort:
If you had a caesarean section, your recovery will take longer. The wound typically takes six to eight weeks to heal fully. During this time:
Whether you breastfeed or not, your breasts will produce milk after birth. Engorgement (when your breasts become full, hard, and uncomfortable) is common around day three to five when your milk comes in. If you are breastfeeding, frequent feeding helps relieve engorgement. If you are not breastfeeding, avoid expressing milk as this signals your body to produce more. Wear a supportive bra and use cold compresses for comfort. Engorgement usually settles within a few days.
Many people notice increased hair shedding around three to six months after birth. During pregnancy, higher oestrogen levels keep hair in its growth phase for longer. After birth, as hormones return to normal, all the hair that was held in place falls out at once. This is temporary and does not indicate a problem. Your hair should return to its normal growth pattern within 12 months.
Postpartum night sweats are common in the first few weeks after birth, caused by falling oestrogen levels and your body shedding the extra fluid it retained during pregnancy. Keep your bedroom cool, wear breathable fabrics, and stay well hydrated.
The NHS offers a postnatal check with your GP at six to eight weeks after birth. This appointment covers:
This appointment is also an opportunity to raise anything that is worrying you, no matter how small it seems. Many people find it helpful to write a list of questions in advance.
Your baby will also have a six-week check, usually with the same GP, to assess their growth, development, heart, hips, eyes, and testes (if applicable).
Around 60 to 80% of new parents experience the baby blues in the first week or two after birth. Symptoms include tearfulness, mood swings, irritability, and feeling overwhelmed. This is caused by the sudden drop in pregnancy hormones combined with exhaustion and the emotional weight of new parenthood. Baby blues typically resolve on their own within two weeks without treatment.
If low mood, anxiety, or feelings of hopelessness persist beyond two weeks or become more severe, this may be postnatal depression. It affects around 1 in 10 women within a year of giving birth, and partners can also be affected. Signs include:
Postnatal depression is not a sign of weakness or failure. It is a medical condition that responds well to treatment, which may include talking therapy, medication, or a combination. Speak to your midwife, health visitor, or GP if you recognise these signs in yourself or your partner.
Less talked about but equally common, postnatal anxiety involves excessive worry, racing thoughts, a constant sense that something bad will happen, or physical symptoms like a racing heart and shortness of breath. It can occur alongside or instead of postnatal depression. The same support pathways apply.
Some people experience symptoms of post-traumatic stress after a difficult or frightening birth. This can include flashbacks, nightmares, and avoidance of anything that reminds you of the birth. The Birth Trauma Association offers specific support, and your GP can refer you for specialist therapy.
This is not the time for self-sufficiency. If people offer to help, say yes. Whether it is someone doing a load of washing, bringing a meal, or holding the baby while you shower, every bit of support matters.
The advice to "sleep when the baby sleeps" is well-intentioned but not always realistic. If you cannot sleep, simply resting with your feet up, closing your eyes, or doing something quiet can help your body recover.
Your body needs fuel to heal and, if you are breastfeeding, to produce milk. Keep simple, nutritious snacks within reach: toast, fruit, nuts, cheese, and plenty of water. You do not need to prepare elaborate meals. Good enough is good enough.
In the early weeks, short walks and gentle stretching are ideal. Avoid high-impact exercise until after your six-week check. If you had a caesarean, follow your medical team's guidance on when to resume activity.
Talking about the hard parts does not make you ungrateful. New parenthood can be joyful and exhausting, wonderful and lonely, all at the same time. Let the people around you know how you are really doing.
Contact your midwife, health visitor, GP, or go to A&E if you experience:
These symptoms are rare but require prompt medical attention.
The fourth trimester refers to the first three months after birth. The idea is that newborns are still adjusting to life outside the womb, and parents are adjusting to life with a new baby. It is a period of profound change that deserves the same attention and preparation as pregnancy itself.
### Bleeding (lochia)
The NHS offers a postnatal check with your GP at six to eight weeks after birth. This appointment covers:
Contact your midwife, health visitor, GP, or go to A&E if you experience:
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