First Trimester Changes

Question 1

Blastocyst

Answer 1

Multicellular structure that forms after conception

Question 2

Embryo

Answer 2

By 2 weeks

Blastocyst has mad its way along fallopian tube and implanted in the uterine lining

Question 3

Primitive placenta

Answer 3

Part of the fertilized egg is developing into placenta

Rootlike projections that penetrate uterine lining and acquires nutrients for developing embryo

Question 4

Androgens

Answer 4

Male and female babies appear same until 9 weeks

Hormones produced if male that signal development of scrotum and penis

Question 5

Fetus

Answer 5

9 weeks old

11 weeks gestational age

Question 6

Chorionic Villi

Answer 6

At end of first month projections extend into uterine lining becoming primitive placenta
Baby’s blood circulates through chorionic villi while mom’s blood circulates into spaces surrounding them (intervillous spaces)

Question 7

Membranes

Answer 7

Amnion and chorion

Create amniotic sac that surrounds baby

Question 8

Amniotic fluid

Answer 8

Protects baby by absorbing bumps from outside, maintaining even temperature and providing a medium for easy movement