The edition · Obstetrics & Gynaecology
Hip extension at crowning did not protect the perineum in a 1,206-woman trial
A pragmatic trial found no difference in significant tears when women lowered their legs at crowning. Also: a UK national cohort of pregnancy with cardiomyopathy, a post hoc look at DHA dose by genotype, an extended truncal block for caesarean pain, and a sharp rise in US hypertensive disorders.
The edition in brief
In a pragmatic randomised trial of 1,206 nulliparous women delivering vaginally at term, directing hip extension at crowning did not reduce second- to fourth-degree tears on intention to treat (66.6% vs 66.2%). As-treated differences in anal sphincter injury did not survive adjustment, and a quarter of the intervention group did not adhere. A UK Obstetric Surveillance System cohort of 210 pregnancies in women with pre-existing cardiomyopathy recorded no maternal deaths, median delivery at 38.1 weeks, heart failure in 10% and arrhythmia in 8%, with one in five babies admitted to the neonatal unit. A post hoc ADORE analysis suggests the FADS Indel genotype may predict who gains from 1,000 mg/day DHA: early preterm birth was 1.1% with high dose versus 4.3% with low dose in I-allele carriers, but numbers were small. A single-centre Chinese trial of 150 women found an ilioinguinal-transversus abdominis plane block with liposomal bupivacaine cut 24-hour sufentanil use by 37% against a standard TAP block. US vital statistics show age-standardised hypertensive disorders of pregnancy rose 74% between 2016 and 2024. The pearl: postpartum blood pressure often peaks days after birth, so follow-up after pre-eclampsia cannot stop at discharge.
Pregnancy with known cardiomyopathy: a national UK picture
Counsel women with known cardiomyopathy that most pregnancies go well under planned joint care, but heart failure affected one in ten.
Liposomal bupivacaine I-TAP block reduced opioid use after caesarean
Consider the I-TAP approach a promising refinement of truncal blocks after caesarean, pending replication.
DHA dose and preterm birth may depend on a single genotype
Treat genotype-guided DHA dosing as a hypothesis worth a trial, not a practice.
US hypertensive disorders of pregnancy rose 74% in nine years
Expect more hypertensive pregnancies, and build postpartum and long-term cardiovascular follow-up into routine care.
Postpartum blood pressure often peaks after discharge
Follow up blood pressure in the first postpartum week after any hypertensive pregnancy, not just at discharge.
Directing hip extension at crowning did not reduce tears
Do not direct women to extend their hips at crowning to protect the perineum — the trial showed no benefit on intention to treat.
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