General embryology Langman's medical embryology, 9th ed Jun zhou(周俊) School of medicine, Zhejiang University 20121225
General embryology Jun Zhou (周俊） School of Medicine, Zhejiang University 20121225 Langman’s Medical Embryology, 9th Ed
a science which study the processes and regulations of development of human fetus. from 1 cell(zygote)to(5-7) x10 cells) oIn general the length of pregnancy is considered to be 280 days or 40 weeks after the onset of the last menstruation, or more accurately, 266 days or 38 weeks after fertilization Onset of Fertilization last M.c 14 days 266 days abor 280 days
Fertilization 14 days Onset of last M.C. 266 days 280 days ◆ a science which study the processes and regulations of development of human fetus.(from 1 cell (zygote) to (5-7) x1012 cells) ◆In general the length of pregnancy is considered to be 280 days or 40 weeks after the onset of the last menstruation, or more accurately, 266 days or 38 weeks after fertilization. Labor
Total 38 weeks. e Preembryonic period: before 2 weeks .Embryonic period: 3-8 Weeks e Fetal period after 9 weeks
Preembryonic period: before 2 weeks Embryonic period: 3-8 weeks Fetal period: after 9 weeks Total 38 weeks:
o Preembryonic period: before 2 weeks o Embryonic period: 3-8 Weeks 3周 4周 5周 6周 7周 周 e Fetal period: after 9 weeks9B16B 20363周
Embryonic period: 3-8 weeks Fetal period: after 9 weeks Preembryonic period: before 2 weeks
Fertilization Definition: the process by which the male and female gametes(sperm and ovum) unite to give rise to zygote place: in the ampullary region of the oviduct
Fertilization ▪ Definition: the process by which the male and female gametes(sperm and ovum) unite to give rise to zygote ▪place: in the ampullary region of the oviduct