Fetal position & pelvisFree in the app
Occipito-posterior & deep transverse arrest
Malpositions that slow labour.
Source: GFMER · textbooksMalposition
| OP at onset | ~10%; about 90% rotate anteriorly (long 3/8 rotation). |
|---|---|
| Persistent OP | Face-to-pubes birth — larger diameter, more perineal trauma. |
| Deep transverse arrest | Head at spines, sagittal suture transverse, no progress — android pelvis, deflexion, weak contractions. |
Options: wait if progressing, manual rotation, rotational ventouse, Kielland’s forceps, or caesarean.
A summary for trained clinicians. Always check the full guideline, the patient in front of you and your hospital's protocol. Spotted an error? Tell us.