http://www.birthrights.org.uk/2014/10/consent-and-student-medics-european-court-ruling/

When it comes to student attendance at births, hospitals should take the following measures to ensure that they do not violate women’s rights:

– Publish a clear policy on student attendance at births that is given to all women ante-natally. It should specify the extent of their participation in any procedures. The policy must make it clear that women have the choice to decline to allow students in the room.
– Ask for women’s consent to student participation at the time of the birth, explaining who the students are, what they will be doing and giving the woman the choice to decline their attendance.
– Respect a woman’s decision to decline to allow students in the room.