Book chapters will be unavailable on Saturday 24th August between 8am-12pm BST. This is for essential maintenance which will provide improved performance going forwards. Please accept our apologies for any inconvenience caused.
To send content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about sending content to .
To send content items to your Kindle, first ensure firstname.lastname@example.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about sending to your Kindle.
Note you can select to send to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Shoulder dystocia is defined as a vaginal cephalic delivery that requires additional obstetric maneuvers to deliver the fetus after gentle traction has failed. It occurs when either the anterior shoulder impacts behind the maternal symphysis or, less commonly, the posterior shoulder impacts over the sacral promontory. Evidence-based algorithms for the management of shoulder dystocia recommend resolution maneuvers designed to improve the relative dimensions of the maternal pelvis (McRoberts’ position and all-fours position), reduce the diameter of the fetal shoulders (suprapubic pressure and delivery of the posterior arm) and/or move the fetal shoulders into a wider pelvic diameter (suprapubic pressure and internal rotational maneuvers).