Embryology and Pregnancy Development Quiz

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Questions and Answers

What is the expected duration of a normal pregnancy in weeks post-fertilization?

38 weeks

42 weeks

40 weeks (correct)

44 weeks

Where does fertilization normally take place?

Uterus

Fallopian tube (correct)

Ovary

Cervix

What is the significance of an ectopic pregnancy?

It leads to identical twins

The embryo implants outside the uterus (correct)

It results in a longer gestation period

It's a normal occurrence

What are the names and time frames for the three developmental periods?

Pre-embryonic period, Embryonic period, Fetal period (B) Signup and view all the answers

What is the initial warning sign of an ectopic pregnancy?

Light vaginal bleeding and pain (D) Signup and view all the answers

What is the treatment for an early ectopic pregnancy without unstable bleeding?

Methotrexate (C) Signup and view all the answers

What structures are formed in week 2 of development?

Embryoblast and amnion (A) Signup and view all the answers

What do the cells of the syncytiotrophoblast do?

Erode the endothelial lining of maternal capillaries (A) Signup and view all the answers

What is the function of the amnion?

To surround the entire embryo as a protective membrane (D) Signup and view all the answers

What happens at the end of implantation?

Complete embedding of the pre-embryo in the uterine endometrium (B) Signup and view all the answers

What is the structure that forms from the epiblast and hypoblast layers?

Bilaminar germ disc (A) Signup and view all the answers

What is the region called where the hypoblast is thickened?

Prechordal/Oropharyngeal Plate (D) Signup and view all the answers

What is the function of the oropharyngeal membrane?

To separate the foregut from the stomodeum (B) Signup and view all the answers

What happens on approximately day 9/10 after the formation of the bilaminar germ disc?

Development of the extraembryonic mesodermal layer (C) Signup and view all the answers

What is the structure that eventually surrounds the entire embryo?

Amnion (A) Signup and view all the answers

What is the function of the fibrin plug?

To close the defect after complete embedding of the pre-embryo (D) Signup and view all the answers

What is the duration of pregnancy from fertilization?

266 days (A) Signup and view all the answers

At what point is prematurity defined?

Before 37 weeks from the last menstrual period (D) Signup and view all the answers

When does overdue or post-term occur?

At 40 weeks from the last menstrual period (A) Signup and view all the answers

What are the three periods into which pregnancy is divided?

Germinal, embryonic, and fetal (C) Signup and view all the answers

What is the initial result of the fertilization of the egg by the sperm?

Zygote (B) Signup and view all the answers

Where does implantation of the blastocyst occur?

On the posterior superior wall of the uterus (D) Signup and view all the answers

What is ectopic pregnancy?

When the fertilized egg grows outside the uterus (D) Signup and view all the answers

What is the main cause of maternal death during the first trimester?

Ectopic pregnancy (A) Signup and view all the answers

What is the duration of the considered menstrual cycle?

28 days (B) Signup and view all the answers

How is a woman's due date calculated?

As 280 days (40 weeks) from the onset of the last menstrual period (B) Signup and view all the answers

Study Notes

Embryology and Pregnancy Development Summary

Embryology is the study of development from fertilization to birth
Pregnancy lasts about 266 days or 38 weeks from fertilization
Prematurity is defined as birth before 37 weeks from the last menstrual period
Overdue or post-term occurs when the baby has not been born by 40 weeks from the last menstrual period
Pregnancy is divided into germinal, embryonic, and fetal periods
Pregnancy begins with fertilization of the egg by the sperm, forming a zygote
Cleavage of the zygote leads to the formation of a blastocyst
Implantation of the blastocyst occurs on the posterior superior wall of the uterus
Ectopic pregnancy, occurring in about 2% of all pregnancies, is when the fertilized egg grows outside the uterus
Ectopic pregnancy is the main cause of maternal death during the first trimester
The menstrual cycle is considered to be 28 days in duration, with ovulation occurring around day 14
A woman's due date is calculated as 280 days (40 weeks) from the onset of the last menstrual period

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Description

Test your knowledge of embryology and pregnancy development with this quiz! From fertilization to birth, explore the stages of pregnancy and learn about key concepts such as prematurity, post-term, and ectopic pregnancy.