上海交通大学医学院：《妇产科学》（双语） 58 Normal Labor and delivery

Normal Labor and Delivery 正常分娩 林建华

Normal Labor and Delivery 正常分娩 林建华

■ Labor: the process by which contractions of uterus expel the fetus. Delivery receive the neonate

◼ Labor : the process by which contractions of uterus expel the fetus. ◼ Delivery : receive the neonate

1. definition a Term pregnancy: 37-42weeks from LMP pre-term delivery (labor): 28-<37 weeks of gestational age post-term delivery: 2 42 weeks Abortion: <28 week 85%o of women spontaneous labor and delivery between 37-42 weeks

1. definition ◼ Term pregnancy: 37-42weeks from LMP ◼ pre-term delivery (labor): 28- <37 weeks of gestational age ◼ post-term delivery: 42 weeks ◼ Abortion : <28 week ◼ 85% of women spontaneous labor and delivery between 37-42 weeks

2. The four factors for labor a Force( uterine contraction) a birth canal (bony canal) a fetus(lie, position ,presentation, weight psychical-factors

2. The four factors for labor ◼ Force ( uterine contraction) ◼ birth canal (bony canal) ◼ fetus (lie,position ,presentation,weight) ◼ psychical-factors

Contractions onset, frequency, duration, intensity increase in frequency and duration a uterus can be felt to harden during contraction lasting about 30-45 seconds interval between contractions to be 5 min a Intensity(slight, middle, heavy) the pain of labor is a character

Contractions onset, frequency, duration, intensity ◼ increase in frequency and duration ◼ uterus can be felt to harden during contraction ◼ lasting about 30-45 seconds ◼ interval between contractions to be 5 min’ ◼ Intensity (slight, middle, heavy) ◼ the pain of labor is a character

N3#

正常曲线 异常曲线 1510

正常曲线 异常曲线

■ Birth canal Bony canal Soft tissue canal(lower part of uterus, cervix, vagina

◼ Birth canal; Bony canal Soft tissue canal (lower part of uterus, cervix, vagina

Bony po elVIs The planes of pelvis inlet plane(promontory mid plane of pelvis (ischia spines) outlet plane(two intersecting triangles)

Bony pelvis ◼ The planes of pelvis ◼ inlet plane (promontory) ◼ mid plane of pelvis (ischia spines) ◼ outlet plane(two intersecting triangles) ◼

Before labor Early effacement 0% effacement 30% Complete effacement Complete 100% dilation