妇产科学--Normal Pregnancy.pptVIP

Normal Pregnancy OBSTETRICSGYNECOLGY HOSPITAL OF FUDAN UNVERSITY Cheng haidong Physiology of pregnancy Pregnancy is the progress of embryo and fetus growing in the uterus. GrowthDevelopment capacitation：spermatozoa be capable of fertilizing the ovum in uterus and oviduct. fertilization：begin with the sperm enters the cytoplasm of the ovum and end with formation of zygote. implantation：Blastocyst implants int the enodometrium. spermovium The formation of spermovium Normal pregnancy 1 Embryofetal development 4w is a gestational age During the first 8 weeks conceptus is called embryo It is called fetus from 9 weeks Growth of fetus 4 weeks： embryo and body stalk can be recognized 8 weeks： the heart beat can ba detect through ultrasound 16weeks：16cm，movement like breathing ;fetal movements can be perceived by the mother 20 weeks：25cm，heart tones may be detectd by stethoscope 24 weeks：30cm，eyebrow 28 weeks：35cm,1000g 32 weeks：40cm 36 weeks：45cm,2500g 40 weeks：50cm，3400g，BPD9cm Embryo (4w) Embryo (8w) Embryo (12w) Embryo (16w) Embryo (20w) Embryo (24w) Embryo (40w) The anatomy of circulation system in the fetus 2 umbilical artery（ligament umbilicale laterale ） 1 umbilical vein（ligament teres hepatis） foramen ovale（completely closed ６～８w) ductus arteriosus（arterial ligament） the features of blood circulation circulation system Fetal appendage Placenta may be defined as fusion of fetal organs to maternal tissues for the purpose of physiologic exchange . It is composed of amnion 、chorion frondosum and decidua basalis. Placenta Development of the placenta： 1. amnion 2. chorion frondosum 3. decidua basalis chorion frondosum Primary villus Secondary villus Tertiary villus Chorion frondosum Free villus （the end of the villus fioating in the intervillous space which is filled with maternal blood）： 　　　 primary stem villus——cotyledons（60~80） Secondary stem villus——cotyledons（200） Tertiary stem villus Anchoring villus （anchor