The simplest way to determine the position of the fetal head in the pelvic cavity

No matter how simple, at first glance, the old method of determining the position of the fetal head in the pelvic cavity along the sagittal suture and fontanelles, it still sometimes leads to unpleasant mistakes not only for inexperienced, novice doctors, but sometimes for doctors with quite a long local experience, and even , albeit more rarely, specialist doctors. Difficulties in such a determination of the position of the head in the pelvis arise especially when this accuracy is especially needed, that is, during obstetric operations (the imposition of forceps, perforator, cranioclast, etc.). In these cases, either due to the long standing of the head, or due to its inconsistency with the mother's pelvis, both the sagittal suture and the fontanelles are very strongly masked by the head tumor and the configuration of the head. Even a very experienced obstetrician-gynecologist can hardly understand the resulting picture of the relationship between sutures and fontanelles.