antepartum normal

Question 1

Two parts of cell division

Answer 1

mitosis- replicate DNA then divide
Meiosis- divide and decrease chromosome # by half (egg and sperm)

Question 2

Gametogenesis

Answer 2

spermatogenesis- beings at puberty
oogenesis- begins in fetal life; present at birth

Question 3

conception- union of egg and sperm

Answer 3

ovum- fertile for approx 24 hours after ovulation
sperm- remain viable in female reproductive system 2-3 days

Question 4

fertilization

Answer 4

zygote- 2 cel organism of united egg/sperm
morula- 16 cells; solid ball produced within 3 days
blastocyst- 58 cells, 4 days, fluid enters and separates into 2 parts (trophoblast and embryoblast); drops into uterus

Question 5

implantation

Answer 5

chorionic villi- finger-like projections develop out of trophoblast; grow into endometrium
decidua basalis- portion under blastocyst where chorionic villi have implanted

Question 6

primary germ lays

Answer 6

during 3rd week
ectoderm
mesoderm
endoderm

Question 7

embryo development

Answer 7

most crucial time in dev of organ systems and main external features- day 15 to 8 weeks after conception
most vulnerable time to malformations from teratogens

Question 8

membranes (formed from trophoblast

Answer 8

chorion- where HCG comes from (6-10d after conception)- becomes covering of fetal side of placenta containing major blood vessels
amnion and amniotic cavity- bag of water- around baby (maternal serum, then fetal lung liquid and urine

Question 9

actions of amnion

Answer 9

protects fetus and maintains temp
volume important
fluid neutral to alkaline

Question 10

umbilical cord

Answer 10

supplies the embryo with maternal nutrients and oxygen