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Study Type: Multicenter retrospective cohort study

Key Question: Does the number and diameter of arterio-arterial (AAA) and veno-venous (VVA) placental anastomoses predict severe brain injury in the surviving monochorionic twin following fetal demise?

Key Findings:

• Severe brain injury occurred in 25% (19/75) of pregnancies; affected placentas had larger AAA diameter (2.5 vs 1.6 mm, p<0.01) and larger VVA diameter (3.0 vs 1.5 mm, p=0.02)
• Presence of VVA (OR 3.47, 95% CI 1.10–10.96) and total AAA/VVA cumulative diameter (OR 1.27, 95% CI 1.09–1.48) were independently associated with severe brain injury
• Discordant cord insertion was more frequent in the brain injury group (47% vs 20%, p=0.03)

Clinical Relevance: These findings may inform counselling and surveillance intensity for monochorionic twin pregnancies complicated by fetal demise in UK fetal medicine units.

Limitations: Associations were non-significant when restricted to single fetal demise cases, likely reflecting insufficient statistical power in this small exploratory cohort.

Study Type: Cross-sectional analysis within a prospective preconception cohort

Key Question: Is exposure to adverse childhood experiences (ACEs) associated with a higher prevalence of PCOS in reproductive-age women?

Key Findings:

• PCOS prevalence increased dose-dependently with ACE burden: 7.4% (0 ACEs) to 14.2% (≥4 ACEs); adjusted PR 1.64 (95% CI 1.33–2.01) for ≥4 vs. 0 ACEs
• Each additional ACE was associated with an 8% higher PCOS prevalence (PR 1.08, 95% CI 1.05–1.11)
• Sexual abuse showed the strongest individual association (PR 1.82, 95% CI 1.45–2.29), followed by parental interpersonal violence and emotional abuse

Clinical Relevance: For UK clinicians managing PCOS, these data support trauma-informed history-taking and highlight childhood adversity as a potentially modifiable upstream determinant of reproductive endocrine health.

Limitations: Cross-sectional design with self-reported PCOS diagnosis precludes causal inference and introduces misclassification bias.

Study Type: Prospective multicentre cohort study (ancillary to an RCT)

Key Question: What are the trajectories of posttraumatic stress symptoms (PSS) following vaginal delivery, and which factors predict persistent or emerging symptoms?

Key Findings:

• Approximately 5% of women had an unfavourable PSS trajectory: 3.5% persistent and 2.1% emerging symptoms at 2 months post-vaginal delivery
• Persistent PSS was associated with younger age, non-European origin, psychiatric history, negative delivery memories, and postpartum anaemia (Hb <9 g/dL; aOR 1.8)
• Emerging PSS was associated with prior abortion, antenatal hospitalisation, labour induction, and negative delivery memories; epidural analgesia was protective (aOR 0.2)

Clinical Relevance: These findings support targeted postpartum PTSD screening in UK maternity services, particularly identifying modifiable risk factors — including adequate anaesthetic provision and prompt anaemia management — relevant to NHS postnatal care pathways.

Limitations: A 40% non-completion rate for questionnaires limits generalisability, despite inverse probability weighting adjustment.

Study Type: Confidential national case note review (descriptive/hypothesis-generating)

Key Question: What maternity care did recently arrived migrant women who died during or shortly after pregnancy receive in the UK over the past decade?

Key Findings:

• Late antenatal booking (>13 weeks) occurred in 70% (19/27) of those eligible for antenatal care
• Professional interpreting services were used by only 42% during antenatal care, falling to 19% intrapartum and 0% postpartum among women requiring interpretation
• Documentation suggesting discrimination or racism was present in 41% (16/39) of cases

Clinical Relevance: This study directly informs NHS maternity services' obligations under the NHS Race Equality Standard and MBRRACE-UK recommendations, highlighting concrete care gaps contributing to the disproportionate maternal mortality risk among migrant women.

Limitations: The cohort is small (n=39) and descriptive only, limiting causal inference and generalisability; findings are hypothesis-generating rather than definitive.

Study Type: Narrative review

Key Question: Is progestogen monotherapy an effective and safe alternative to standard combined MHT in women with contraindications to oestrogen?

Key Findings:

• Progestogen monotherapy demonstrates clinically meaningful VMS relief across oral, intramuscular, and transdermal preparations, with micronized progesterone offering additional sleep benefits
• Synthetic progestins (medroxyprogesterone acetate, megestrol acetate, norethindrone acetate) variably confer bone protection; mood effects appear broadly neutral
• Breast cancer risk with progestogen monotherapy remains unquantified due to underpowered studies; contraindications are limited to unexplained abnormal vaginal bleeding and personal breast cancer history

Clinical Relevance: This review supports a structured approach to progestogen monotherapy for UK women ineligible for oestrogen-containing MHT — including those with prior VTE, coronary artery disease, or select gynaecological malignancies — a population often inadequately supported within current NHS menopause services.

Limitations: Narrative methodology with heterogeneous included studies limits strength of conclusions; no meta-analysis performed.

Study Type: Block-randomised quality-improvement study

Key Question: Does the rate of prophylactic oxytocin infusion after vaginal birth affect postpartum blood loss?

Key Findings:

• High-rate oxytocin (500 mL/h; 30 IU over 1 hour) reduced median quantitative blood loss by 100 mL compared to low-rate (83 mL/h; 10 IU over 2 hours) (95% CI −157 to −43; p=0.001), with a monotonic dose-response trend (p=0.005)
• Second-line uterotonic requirement was lower in the high-rate group (21.5% vs 29.4%; p=0.047)
• Postpartum haemorrhage rates and blood transfusion requirements did not differ significantly between groups

Clinical Relevance: UK maternity units vary in oxytocin infusion protocols following vaginal birth; this study suggests a higher-rate regimen may meaningfully reduce blood loss and second-line uterotonic use, relevant to PROMPT/RCOG PPH prevention guidance.

Limitations: Single-centre quality-improvement design limits generalisability, and block randomisation by time interval introduces potential confounding from seasonal or practice variation.

Study Type: Retrospective case series

Key Question: What are the postnatal diagnoses and outcomes in fetuses with persistent sinus bradycardia identified on fetal echocardiography?

Key Findings:

• Of 34 cases of persistent FSB, 68% received a clinically significant postnatal diagnosis; LQTS was most common (n=10), followed by sinus node dysfunction (n=6), cardiomyopathy, and syndromic conditions
• Genetic mutations were identified in 17/22 tested cases, predominantly KCNQ1 and KCNH2 (LQTS-related); cascade testing identified at-risk relatives in 3 families
• Only one neonate required intervention (pacemaker at age 4 for anti-Ro-associated SND); 11 cases remained classified as normal postnatally

Clinical Relevance: This UK tertiary fetal cardiology series supports treating persistent FSB as a potential marker of inherited arrhythmia syndromes or cardiomyopathy, justifying structured postnatal cardiac follow-up, genetic testing, and family cascade screening rather than reassurance alone.

Limitations: Small single-centre retrospective cohort limits generalisability and may overrepresent complex pathology due to tertiary referral bias.