a normal child birth, pelvis structure and fetus presentation. By Dr. Eyal Sheiner, Israel.

1. NORMAL LABOR AND DELIVERY Eyal Sheiner M.D. Soroka University Medical Center

4. The final common pathway of this stimulation is the creation of rhythmic membrane depolarization in the myometrial cells resulting in an increase in intrauterine pressure. Power

6. Passenger Presentation Lie Position, Station

8. Diameters of the fetal head at term

9. Locating the sagittal suture by vaginal examination

11. Longitudinal lie. Cephalic presentation. Differences in attitude of fetal body in (A) vertex, (B) sinciput, (C) brow and (D) face presentations. Note changes in fetal attitude in relation to fetal vertex as the fetal head becomes less flexed

13. Transverse lie. Right acromiodorsoposterior position (RADP) The shoulder of the fetus is to the mother’s right, and the back is posterior

14. Longitudinal lie. Vertex presentation A. Right occiput posterior (ROP) B. Right occiput transverse (ROT)

15. When the lowermost portion of the fetal head is above the ischial spines, the biparietal diameter of the head is not likely to have passed through the pelvic inlet and therefore is not engaged (P = sacral promontory , Sym = symphysis pubis).

16. Head not engaged

17. Engagement

20. Normal female pelvis with the false and true pelvis identified

21. The four parent pelvic types of the Caldwell-Moloy classification A line passing through the widest transverse diameter divides the inlet into posterior (P) and anterior (A) segments.

22. (I) Gynaecoid pelvis (50%) Best suited for child bearing, fortunately most common

23. Gynecoid pelvis

24. (II) Android pelvis (20%) It is a male type, not favorable for delivery

25. Android pelvis

26. Gynecoid VS Android

33. The third stage Placental separation

34. Latent phase This phase can be reached over a period of days or in as little as two to six hours