Clinical overview
The puerperium is the interval from delivery of the placenta until the maternal reproductive tract and physiology have returned, more or less, to the pre-pregnant state — classically taken as the six weeks after birth. It is a deceptively quiet phase. The drama of labour is over, the baby is out, and the temptation — for mother, family and tired staff alike — is to treat the woman as "delivered" and therefore safe. The data say otherwise. A substantial share of maternal deaths in South Africa occur after delivery rather than during labour, driven by postpartum haemorrhage, sepsis, hypertensive complications and venous thromboembolism, all of which present in a body that is rapidly re-modelling. The registrar's task in the normal puerperium is to know what ordinary physiology looks like so precisely that the abnormal announces itself.
This chapter describes the normal course — the involuting uterus, the lochia sequence, the establishment of lactation, the diuresis and the resolution of the pregnancy-state cardiovascular and haemostatic changes — and frames the routine observations and counselling that surround it. It is the physiological baseline against which puerperal-complications are read. Throughout, the South African framing is the National Integrated Maternal and Perinatal Care Guideline, 5th edition (2024), which structures postnatal care into the immediate, early and late puerperium and ties each phase to scheduled contacts.
Core knowledge
Defining and sub-dividing the puerperium
Standard teaching divides the puerperium into three overlapping phases, useful because risk clusters differently in each:
- Immediate — the first 24 hours, dominated by haemorrhage risk and cardiovascular re-adjustment.
- Early — up to roughly the first week, when involution is most rapid and sepsis and secondary haemorrhage emerge.
- Late (remote) — to six weeks, when lactation matures, fertility may return and contraception and mental-health needs come to the fore.
Uterine involution
After the third stage the uterus weighs about 1 kg; by six weeks it has returned to roughly 50–70 g (standard teaching). Involution proceeds by two mechanisms: myometrial contraction and retraction, which kinks and occludes the spiral arterioles (the "living ligatures") to secure haemostasis, and autolysis of the surplus muscle cytoplasm by intracellular proteolysis, so the number of myocytes changes little while each cell shrinks. Clinically the fundus is felt at about the umbilicus immediately after delivery and descends roughly one finger-breadth (≈1 cm) per day, becoming impalpable abdominally — behind the pubic symphysis — by about day 10–14 (standard teaching). Afterpains — cramping from these contractions — are worse in multiparas and during breastfeeding, because suckling triggers oxytocin release.
Lochia
The decidua sheds in a sequence whose colour and volume are a useful clinical clock:
- Lochia rubra — red, the first ~3–4 days, blood with decidual debris.
- Lochia serosa — pinkish-brown, to around day 10, serous with leucocytes.
- Lochia alba — yellow-white, for up to several weeks, predominantly leucocytes and cervical mucus (standard teaching on timing).
The trend should be of diminishing volume and lightening colour. A return to fresh red bleeding, an offensive odour, or passage of clots after the flow had settled all point away from normal involution and toward retained products or endometritis.
The cervix, vagina and pelvic floor
The cervix closes progressively: from an admitting hand at delivery, it usually admits only a fingertip by the end of the first week, though the external os characteristically remains a transverse slit thereafter (the parous os). The hypo-oestrogenic vaginal epithelium is thin and the rugae are lost early, recovering by about three weeks as ovarian function resumes (delayed by lactation). The pelvic floor and the introitus, stretched in labour, regain tone over weeks, aided by pelvic-floor exercises — relevant to later continence and to prolapse risk.
Endocrine and ovarian changes; return of fertility
Delivery of the placenta removes the dominant source of oestrogen, progesterone and human placental lactogen, whose levels fall sharply within days. The withdrawal of placental progesterone disinhibits prolactin's action on the breast and permits lactogenesis. In non-lactating women, ovulation may return from as early as about 4–6 weeks (standard teaching); in fully breastfeeding women, lactational amenorrhoea suppresses ovulation for longer but is never absolute. The practical message for postpartum-contraception is that the first ovulation precedes the first menstruation, so a woman can conceive before she ever sees a period.
Cardiovascular, renal, haematological and other systems
The pregnancy expansion of plasma volume and the autotransfusion of uterine blood at delivery transiently raise cardiac preload; this is offset by a brisk diuresis over the first days that clears the gestational fluid load. Pregnancy is a hypercoagulable state — raised fibrinogen and clotting factors, reduced fibrinolysis — and this does not switch off at delivery; it persists into the puerperium and is the basis of the heightened venous thromboembolism risk, which is why mobilisation, hydration and risk-assessed thromboprophylaxis matter (see high-risk-pregnancy-risks). The physiological dilutional anaemia of pregnancy recovers as plasma volume contracts. A modest leucocytosis is normal in early puerperium and must not be over-interpreted as infection on its own. Gastrointestinal tone returns gradually, with constipation common, and a transient mild pyrexia in the first 24 hours can accompany the systemic response to delivery — but a temperature ≥38 °C beyond the first day demands a search for sepsis rather than reassurance.
Lactation
Lactogenesis is a staged process. Colostrum — protein- and immunoglobulin (secretory IgA)-rich, low in volume — is secreted from late pregnancy and the first days. Secretory activation ("milk coming in") typically occurs around day 2–4 postpartum as progesterone withdrawal removes the brake on prolactin. Two reflexes sustain feeding: prolactin (anterior pituitary) drives milk synthesis in response to suckling, while oxytocin (posterior pituitary) drives the let-down (myoepithelial contraction), and is conditionable — released by the baby's cry, not only the latch. Ongoing milk production is governed locally by supply and demand: removal of milk drives further synthesis, so frequent effective feeding, not the clock, maintains supply. The clinical care of feeding — positioning, latch, common problems — sits in infant-feeding.
Figure I18.1 — Six-week physiological reset of the normal puerperium, including involution, lochia, lactation, systemic changes and return of fertility.
Assessment
The immediate postnatal hour and first 24 hours
The first hour is an observation period, not a discharge. The NDoH 5th edition (2024) structure of postnatal care frames a sequence of timed contacts; the fourth stage of labour is monitored actively because most catastrophic primary haemorrhage occurs here. Assess and document:
- Vital signs — pulse, blood pressure, temperature, respiratory rate; repeated per protocol. A rising pulse with falling or borderline BP is the early signature of concealed bleeding.
- The uterus — palpate the fundus: it should be firm, central and at or below the umbilicus. A soft, "boggy", high or deviated uterus signals atony or a full bladder.
- Lochia and the perineum — estimate blood loss (visual estimation underestimates; weigh swabs/drapes where possible), inspect any tear or episiotomy and any caesarean wound.
- Bladder — ensure the woman passes urine; a distended bladder displaces the uterus and prevents contraction, and voiding should be confirmed within a few hours.
- Skin-to-skin and early feeding — supports thermoregulation, bonding and lactogenesis, and is part of routine respectful care (see respectful-care).
Daily postnatal review
Each subsequent review walks the same systems, building a trend: temperature and pulse, the height and tone of the fundus (involuting on schedule?), the colour, volume and odour of lochia, the breasts (filling, comfortable, soft after feeds vs engorged/red), the legs (calf pain/swelling prompting VTE thought), the perineum/wound (clean, healing, not gaping or discharging), bladder and bowel function, mobility and pain control. Ask routinely about mood: low mood and tearfulness peaking around day 3–5 ("baby blues") is common and self-limiting; persistent or severe symptoms screen toward postnatal depression (see gbv-mental-health-pregnancy).
Figure I18.2 — Postnatal safety sweep for the first hour, first 24 hours, daily reviews and the six-week review.
Investigations
The normal puerperium needs few investigations; they are driven by findings, not routine. Check the haemoglobin where there was significant blood loss or antenatal anaemia. Confirm and act on key results carried over from pregnancy: Rhesus status (anti-D for the non-sensitised Rh-negative woman delivered of a Rh-positive infant — see rh-isoimmunisation), HIV status with the relevant maternal and infant management, rubella non-immunity flagging postpartum MMR, and any outstanding syphilis result. Where a clinical question arises — fever, offensive lochia, calf swelling — investigate that question specifically; this is the territory of puerperal-complications.
Management
Management of the normal puerperium is largely structured surveillance, support and counselling, with the discipline of escalating the moment normal becomes abnormal.
Routine care and the NDoH contact schedule
The NDoH (NDoH, 2024) organises postnatal care around scheduled maternal-and-infant contacts after delivery and through the six weeks, with an end-of-puerperium review. The principles for the registrar:
- Observe before discharge. Do not discharge an unstable woman, one still bleeding briskly, or one who has not voided.
- Analgesia — simple, stepwise: paracetamol and an NSAID where not contraindicated cover afterpains and perineal/wound pain; both are compatible with breastfeeding.
- Iron and folate — continue/replace per blood loss and antenatal anaemia.
- Perineal and wound care — hygiene, analgesia, and review of any third- or fourth-degree tear repair.
- Mobilisation and hydration — reduce VTE and aid bowel/bladder recovery.
- Pelvic-floor exercises — counselled before discharge.
Supporting lactation
Encourage early, frequent, on-demand feeding and good latch; reassure that the small colostrum volumes are sufficient and that "milk coming in" around day 2–4 is normal. Manage early engorgement with frequent feeding and comfort measures, distinguishing it from mastitis. The detailed feeding curriculum, including HIV and infant-feeding choices in the SA context, is in infant-feeding.
Contraception counselling — begin in the puerperium
Fertility can return before the first period, so contraception is discussed before discharge, not deferred to six weeks. Method timing is governed by breastfeeding status and VTE risk; the WHO Medical Eligibility Criteria for Contraceptive Use (6th ed, 2025) and the South African National Contraception Clinical Guidelines (2019) are the references, and the full method-by-method discussion is in postpartum-contraception. In brief: progestogen-only methods and the copper IUCD are broadly suitable early postpartum; combined hormonal methods are generally avoided in the first weeks because of the puerperal VTE risk; and immediate postpartum/post-placental IUCD or implant insertion is a powerful way to avoid the lost opportunity of a missed six-week visit.
Immunisation and outstanding maternal health
Give anti-D to eligible Rh-negative women, MMR to the rubella non-immune, and complete any other indicated maternal vaccination before discharge — the puerperal admission is a chance to close gaps (see vaccines-in-pregnancy). Ensure HIV care continuity, with the woman on her ART and the infant's prophylaxis and testing arranged.
The six-week review
The closing contact reviews involution complete (no abnormal bleeding, uterus not palpable, lochia settled), wound/perineal healing, mood, feeding, contraception in place, blood pressure normalised in those with hypertensive disease of pregnancy (see hypertension-in-pregnancy) with a plan for ongoing follow-up, anaemia corrected, and any chronic disease handed back to longitudinal care. Cervical screening status is noted and arranged per SA policy.
Emergency drill — recognising deterioration in the "normal" puerperium
Even in a puerperium expected to be normal, the registrar must be primed for the two time-critical events that masquerade as ordinary postnatal findings:
Postpartum haemorrhage (the soft, boggy uterus / heavy fresh bleeding):
Call for help. Rub up a contraction (uterine massage) and empty the bladder. Give a uterotonic (oxytocic first-line per SA EML), give tranexamic acid 1 g IV early — the WOMAN trial (Lancet 2017) showed TXA within 3 hours of onset reduces bleeding death. Secure two large-bore IV lines, take bloods including crossmatch, run IV fluids, examine for the cause (the four Ts — tone, tissue, trauma, thrombin) and escalate. The full protocol is postpartum-haemorrhage.
Genital-tract sepsis (fever, offensive lochia, tender uterus, tachycardia):
Think sepsis the moment temperature is ≥38 °C with a suggestive picture. Take cultures, give broad-spectrum IV antibiotics early, give IV fluids, measure lactate and monitor for shock — a "sepsis six" approach. Maternal sepsis is a leading cause of SA maternal death; do not be reassured by a single normal observation. See puerperal-complications.
Eclampsia/severe hypertension can present for the first time postnatally, so a headache, visual disturbance or convulsion in the puerperium is managed as pre-eclampsia/eclampsia — magnesium sulphate and BP control — not dismissed.
Figure I18.3 — Red-flag escalation drill for postpartum haemorrhage, sepsis, postnatal pre-eclampsia/eclampsia and VTE/PE.
Red flags / pitfalls
- "She's delivered, so she's safe." The commonest and most dangerous pitfall. PPH, sepsis, VTE and late-onset pre-eclampsia all strike in the puerperium. Many SA maternal deaths occur postpartum — the Saving Mothers / NCCEMD reports repeatedly identify postnatal haemorrhage, hypertension and infection (with HIV) among leading causes.
- The full bladder mimicking and causing atony. A high, deviated, poorly contracting uterus is a full bladder until proven otherwise — empty it before reaching for more uterotonic.
- Misreading lochia. A return to fresh red bleeding, an offensive odour, or clots after the flow had lightened is not normal lochia — think retained products and endometritis, the substrate of secondary PPH.
- Over-calling normal findings. A physiological early leucocytosis and a transient first-day low-grade temperature are normal; do not start antibiotics on a white count alone. Conversely, never under-call a temperature ≥38 °C beyond day one.
- Forgetting the legs. Calf pain or unilateral swelling in a hypercoagulable postpartum woman is VTE until excluded; chest symptoms raise pulmonary embolism.
- Deferring contraception to six weeks. Ovulation can precede the first period; counsel and ideally initiate a method before discharge.
- Combined hormonal contraception too early. Avoid in the first weeks postpartum because of compounded VTE risk; favour progestogen-only or the copper IUCD.
- Missing the mind. Persistent low mood, hopelessness or thoughts of self-harm are not "baby blues" — screen and refer.
- Losing the woman to follow-up. The six-week visit is where unresolved hypertension, anaemia, contraception and feeding are caught; a missed visit is a missed safety net — use the puerperal admission to do as much as possible.
Evidence anchors
- National Integrated Maternal and Perinatal Care Guideline, South Africa, 5th edition (2024) — the SA source of truth for postnatal care structure, the schedule of postnatal contacts, the six-week review, anti-D and infant-feeding guidance.
- Saving Mothers Report (NCCEMD), South Africa — triennial confidential enquiry; obstetric haemorrhage, hypertension and non-pregnancy-related infection (HIV) feature among leading maternal-death causes, much of it postpartum; cite the latest triennium.
- WOMAN trial (Lancet 2017) — tranexamic acid 1 g IV within 3 hours of PPH onset reduces death from bleeding; anchors early TXA in the puerperal haemorrhage drill.
- RCOG Green-top Guideline No. 52 — Prevention and Management of Postpartum Haemorrhage — for the secondary-haemorrhage and PPH management cross-reference.
- WHO Medical Eligibility Criteria for Contraceptive Use, 6th edition (2025) and South African National Contraception Clinical Guidelines (2019) — postpartum method timing and breastfeeding/VTE eligibility.
- South African National HIV/ART Consolidated Guidelines (2023) — continuity of maternal ART and infant prophylaxis through the puerperium.
Author notes on uncertainty: The phase definitions (immediate/early/late puerperium), the involution timeline (uterus ~1 kg → ~50–70 g; descent ≈1 cm/day; impalpable by ~day 10–14), the lochia colour/timing sequence (rubra/serosa/alba), secretory activation at ~day 2–4, return of ovulation at ~4–6 weeks in non-lactating women, and the prolactin/oxytocin physiology are presented as standard textbook teaching, hedged accordingly, and are not line-itemed in
docs/VERIFIED-SOURCES.md; no citation is attached to those specific numbers. Exact postnatal-contact timings and the ≥38 °C sepsis threshold should be confirmed against the current NDoH (NDoH, 2024) PDF before asserting precise values. The TXA dose/timing is taken from the WOMAN trial as listed in VERIFIED-SOURCES.