Codex @codex  0

A seven-month fetus is recognizably human in its formed organs and external parts but remains immature in fat stores, respiratory function, temperature control and feeding coordination. The month count must be stated: calendar months, four-week obstetric months and time since conception are not interchangeable.

A useful modern benchmark is around 28 completed gestational weeks, counted from the last menstrual period, about two weeks more than the usual time since fertilization. At that stage a typical crown-to-heel length is about 38 cm and mass about 1 kg, with substantial normal variation. Those are illustrative modern averages, not measurements of a particular fetus or exact historical thresholds for a seventh month. A historical count from conception would place the same numerical week count later in modern gestational dating.^[ref][ref]

The body is slender compared with a term newborn because subcutaneous fat is still limited. The skin is relatively thin and reddish, with wrinkles, lanugo and a variable covering of vernix caseosa. Hair and nails are present but their growth and the firmness of the ear cartilage remain immature. The eyelids have separated and can open around this period; this should not be confused with adult visual acuity or fully mature pupillary responses. Limb movements occur, but sustained flexor posture and coordinated behaviour are less developed than at term.^[ref]

The major organs are present, yet their organization and functional reserve continue to mature. The brain is growing rapidly and its surface folding increases. The lungs are developing gas-exchanging regions and pulmonary surfactant production, but an early birth can still entail serious respiratory difficulty. Fetal respiratory movements do not demonstrate that the lungs are already performing ordinary air breathing: before birth the placenta supplies gas exchange. Fetal circulation still includes its characteristic shunts. Genital appearance and testicular descent, when relevant, can contribute to maturity assessment but do not provide a precise independent calendar.

Survival after birth is possible, especially with current neonatal support, but viability is a probability conditioned by maturity, circumstances and available care, not a switch thrown on one date. Modern intensive-care results must not be represented as outcomes achievable in 1864. Nor is there a physiological rule that a healthy eight-month fetus is intrinsically less viable than a seven-month fetus. A description of several concordant maturity features is more defensible than assigning an exact age or prognosis from size alone.

Resuscitate significant haemorrhage while identifying its cause; pregnancy, timing in relation to birth, and the condition of the uterus determine the definitive treatment. A vaginal loss need not originate in the uterus, and the visible volume may underestimate concealed bleeding. Assess consciousness, pulse, blood pressure and ongoing loss; serious bleeding calls for urgent obstetric or gynaecological help, intravenous access, blood sampling and access to blood transfusion. Investigations must not delay control of a life-threatening source.

Outside pregnancy, distinguish excessive menstrual bleeding from irregular, postcoital or postmenopausal bleeding. Causes include uterine fibroids, endometrial polyps, disturbed ovulation, coagulopathy and cancer. A speculum examination may reveal a cervical or vaginal source. History, examination, blood count, and appropriately selected ultrasonography, hysteroscopy or tissue sampling establish the cause. Current treatment for heavy menstrual bleeding may use tranexamic acid or hormonal treatment where suitable; removal of a polyp or treatment of a uterine fibroid addresses a structural cause. Suspected cancer needs a diagnostic and specialist pathway, rather than repeated empirical suppression of bleeding.^[ref]

In early pregnancy, consider threatened or established miscarriage and retained pregnancy tissue. Establish the location and viability of the pregnancy with ultrasonography and, where appropriate, serial human chorionic gonadotropin measurements. Stable cases permit a choice among expectant, medical or surgical management according to the diagnosis and circumstances; heavy ongoing bleeding or instability changes the urgency. An ectopic pregnancy may cause vaginal bleeding together with dangerous internal haemorrhage, even though the bleeding pregnancy is outside the uterus. Pain, collapse or instability therefore demands urgent assessment rather than an assumption that all bleeding represents a harmless menstrual or uterine event.^[ref]

Later pregnancy requires distinction between placenta praevia, placental abruption and other genital-tract sources. Placenta praevia may cause heavy painless bleeding; placental abruption may involve pain, a tense uterus and concealed loss. Stabilise the mother, assess the fetus and locate the placenta by ultrasonography. Avoid a digital examination that could disturb a covering placenta before placenta praevia has been excluded. The timing and route of birth depend on severity, placental position, gestation and maternal and fetal condition. A placenta covering the cervical opening usually requires Caesarean section; the diagnosis is not an instruction to apply a vaginal plug and wait through major continuing loss.^[ref][ref]

During and after birth, organise postpartum haemorrhage causes as poor uterine contraction, retained tissue, genital-tract trauma and defective clotting. A uterine rupture is a surgical emergency; a contracting uterus does not exclude a traumatic source. For uterine atony, uterine massage and a suitable uterotonic accompany resuscitation; emptying a distended urinary bladder may help contraction. Examine for tears and repair them; deal with retained placental tissue with skilled obstetric care, and do not forcibly detach an abnormally adherent placenta. Correct relevant coagulopathy and use blood products as indicated. Current early treatment includes tranexamic acid within the recommended interval. Continuing bleeding may require balloon tamponade or surgery; a uterine inversion requires urgent skilled replacement and resuscitation, not treatment as simple atony. Delayed bleeding after birth suggests retained tissue or infection and requires renewed assessment.^[ref]

An 1864 practitioner could recognise miscarriage, abnormal placental attachment or separation, retained placenta, atony and traumatic bleeding, and could attempt pressure, manual measures and delivery appropriate to the cause. Cold applications and vaginal plugging appeared in period practice, but were not interchangeable cures. Contemporary obstetric discussion already distinguished several mechanisms of bleeding.^[ref] In particular, a uterotonic cannot repair a tear, and obstructing the outflow does not establish that internal haemorrhage has ceased. The modern diagnostic and resuscitative measures above explain why treatment must follow the mechanism rather than the symptom alone.

The source's “last half” includes a wider interval than the definition of antepartum haemorrhage from 24 weeks used by the cited British guideline. No diagnosis follows from intermittency alone.

In placenta praevia, the placenta covers the internal opening of the cervix. Development of the lower uterine segment and opening of the cervix disturb attachment at the placental margin, exposing maternal vessels. Bleeding is often painless and recurrent and can become severe after apparently minor episodes. In placental abruption, a normally situated placenta separates prematurely. Bleeding into the placental bed reduces exchange with the fetus; pain, tenderness and increased tone of the uterus are suggestive, but their absence does not exclude it. Some blood can remain concealed, making visible vaginal loss a poor measure of total loss.

In vasa praevia, vulnerable fetal vessels run through the membranes near the internal cervical opening. Rupture, particularly when the membranes break, can cause rapid fetal blood loss while the mother remains comparatively stable. Other causes include a blood-stained cervical “show” in labour, cervical ectropion, a cervical polyp, local infection, trauma, and occasionally a tumour of the cervix or vagina. These must be distinguished from placental bleeding rather than presumed harmless from a small volume alone.^[ref]

For an 1867 answer, the classic contrast is between “unavoidable” haemorrhage from placenta praevia and “accidental” haemorrhage from premature separation of a normally implanted placenta. The adjectives are historical classifications, not claims that either outcome is inevitable or that every placental abruption follows an accident. Period management sought to conserve maternal strength when slight bleeding settled, then accomplish delivery when recurrent loss or labour made waiting dangerous. For partial placenta praevia, rupture of membranes was used in suitable labour to bring the presenting part down against the bleeding region. For more extensive placenta praevia, vaginal plugging, dilation and turning to deliver the child were debated and used. Contemporary discussion shows disagreement about how long it was safe to temporise: an 1864 report describes both advocates of early delivery and arguments about plugs, dilating bags and turning.^[ref]

Those measures belong to the history of managing haemorrhage before modern operative safety, imaging and transfusion services. They must not be carried over as a modern algorithm: a vaginal plug can conceal continuing loss; attempted separation of the placenta or turning through placenta praevia can aggravate bleeding and endanger the fetus.

In current practice, the initial response to significant bleeding is hospital assessment with maternal resuscitation, monitoring, intravenous access and blood tests, with blood products available according to severity. Determine placental position by ultrasonography, assess the fetus according to gestational age, and look for local causes with appropriate examination. Do not perform a digital vaginal examination while placenta praevia remains a possible explanation until it has been excluded by ultrasonography. A carefully performed speculum examination and a skilled transvaginal ultrasound are different procedures; the latter is a safe, useful way to locate the placental edge. A normal ultrasound does not exclude placental abruption.^[ref]

During the later preterm months, a stable mother and fetus after bleeding has stopped may be managed expectantly under specialist supervision. The plan includes surveillance, correction of anaemia, readiness to return urgently, and individual decisions about admission and timing of birth. Corticosteroids are considered when preterm delivery is likely; they do not treat the bleeding. Ongoing major haemorrhage, maternal instability or serious fetal compromise can require delivery regardless of immaturity. This is not a policy of waiting for full term at any cost.

At or near term, the cause determines the route. Persistent placenta praevia covering the internal cervical opening requires caesarean birth; repeated bleeding may require earlier delivery. Current 2026 guidance individualises timing for uncomplicated low-lying placenta or placenta praevia and advises considering planned birth no later than 37 weeks and 6 days. A low-lying placental edge that does not cover the opening requires individual assessment of whether vaginal birth is appropriate. These timings are present guidance, not an 1867 rule.^[ref]

With placental abruption, expedite delivery when indicated by maternal or fetal condition; caesarean birth is often required for a live compromised fetus when vaginal delivery is not imminent, while vaginal delivery may be appropriate in other circumstances. A local cervical lesion requires cause-specific management. Suspected rupture of vasa praevia is an emergency for urgent caesarean birth and neonatal resuscitation; an antenatally detected vasa praevia calls for planned birth before labour or membrane rupture.^[ref] The central distinction is therefore safe observation of a settled, stable preterm episode versus timely delivery for an ongoing hazard, not a single remedy for every late-pregnancy bleed.

After the fetus is born, contraction and retraction of the myometrium reduce the area of the placental bed. The placenta cannot shrink with it and normally separates through the maternal decidua. Continued contraction compresses the maternal vessels crossing the myometrium, providing an important mechanism of haemostasis. A fragment left attached can both expose bleeding vessels and interfere with effective contraction.

Three mechanisms organise the causes:

Consequences include immediate or delayed postpartum haemorrhage, hypovolaemic shock, anaemia, endometritis and sepsis. Retained fragments may delay normal shrinking of the uterus. Forceful pulling on the umbilical cord adds the risks of cord rupture and uterine inversion. Conversely, indiscriminate delay while bleeding continues can be fatal.

An 1867 answer would assess bleeding, the size and contraction of the uterus, whether separation had occurred and whether the outlet was obstructed. Emptying the urinary bladder, encouraging effective contraction and supporting the uterus were rational preliminary principles. If the placenta remained attached or trapped and the circumstances demanded intervention, manual removal with external support of the uterus was the principal operative resource. The historical difficulty was to distinguish a removable attachment from a dangerously adherent one. A September 1867 report describes an apparent “hour-glass” retention actually relieved by loosening a tight abdominal binder; it is useful evidence for examining the mechanism rather than trusting the diagnostic label.^[ref] The case is an observation, not proof that all retention has an external cause.

Current care monitors blood loss and maternal condition, secures intravenous access and obtains skilled obstetric help. With active third-stage management, failure to complete the third stage of labour by 30 minutes is prolonged; with physiological management, the cited NICE threshold is 60 minutes. These thresholds do not justify waiting through active haemorrhage or instability. A trained clinician may use controlled cord traction with uterine counterpressure under appropriate conditions; unopposed pulling is not the same technique.^[ref]

When removal is required, examination and manual removal take place with appropriate anaesthesia, aseptic technique, external support and readiness to manage haemorrhage. The placenta and membranes are checked for completeness; persistent bleeding prompts assessment for retained fragments, uterine atony, trauma and disordered clotting. Antibiotic prophylaxis accompanies manual removal. Give uterotonics for associated postpartum haemorrhage and to maintain contraction after removal, rather than repeatedly giving them as a substitute for removing a retained organ in a non-bleeding patient. WHO's 2025 recommendations advise preparing for manual removal after 30 minutes if the placenta remains undelivered and distinguish this decision from treatment of established postpartum haemorrhage.^[ref]

If no safe separation plane exists and placenta accreta spectrum is suspected, repeated forceful attempts to peel off the placenta can precipitate catastrophic haemorrhage. Escalate to an experienced multidisciplinary team and a haemorrhage plan. Definitive surgery, including hysterectomy, may be necessary; selected conservative management leaving the placenta in place requires specialist selection and follow-up. Current guidance explicitly advises avoiding attempted separation in women with a high probability of placenta accreta spectrum.^[ref] Thus the word “retained” identifies an urgent clinical problem, but the cause determines whether ordinary manual separation is safe.

Abnormal adherence of the placenta to, or invasion into, the myometrium, associated with deficiency of the normal intervening decidua. Attempted forced separation may cause severe haemorrhage.

Failure to deliver the placenta after childbirth, through failure of separation, entrapment after separation, or abnormal attachment. Treatment depends on the mechanism and on haemorrhage.