妇产科2（Obstetrics and Gynecology 2）.docVIP

妇产科2（Obstetrics and Gynecology 2） The second chapter is pregnancy physiology Pregnancy occurred 1, about pregnancy, the correct description is () A. is the process of development and development of embryos and fetuses in the mothers body B. ovulation is the beginning of pregnancy C. is the termination of pregnancy and fetal childbirth D. pregnancies range from about 400 days E. pregnancy is a non physiological process 2. Fertilization means (D) A. sperm enter the vagina B. sperm capacitation C. has been able to meet sperm and eggs D. has been able to combine sperm with mature eggs After E. sperm and mature eggs combine, mitosis begins 3, easy conception period means (C) A. menstrual period B. menstruation is clean after 1-2 days C. ovulation 4-5 days before and after D. 7-8 days after ovulation E. 1-2 days before menstruation 4, a pregnant woman is now fourth days pregnant, it is estimated that fertilized eggs in () A. uterine cavity has not been implanted B. fallopian tube C. uterine cavity is being implanted D. uterine cavity has been implanted E. uterine cavity has entered the fetal phase 5, the formation of placenta in pregnancy (a few weeks) A.12 weeks B.14 weeks C.16 weeks D.18 weeks E.20 weeks 6, about placental function description is correct () A. prevents all bacteria from passing through The B. virus cannot pass through the placenta C. can only synthesize estrogen D. prevents fetal compression E. can be passed through the placenta to the fetus 7, the placenta is composed of () A. chorion frondosum decidua amniotic membrane + +. B. chorion frondosum + bottom stripping + package off membrane. C. consists of chorion chorion + basement membrane + amniotic membrane D. consists of chorion chorion + basement membrane + envelope membrane E. chorion frondosum decidua chorion frondosum + + membrane. 8. The structure and function of placenta. Which of the following is incorrect? A. placenta is a combination of embryonic and maternal tissues B. placenta has endocrine