Leading obstetricians and gynaecologists have given reasons why the placenta must be out 15 minutes after vaginal delivery.

(This would be seen at your anatomy ultrasound when you're about 20 weeks pregnant.) If the placenta sits over the cervix (or ...

In around one in six pregnancies a mid-trimester scan will show that the placenta is lower down than usual. There is nothing that you can do to help it move up out of the way.