EARLY FETAL DEVELOPMENT

Question 1

HCG secretion begins around time of implantation of blastocyst

Answer 1

within week 1

Question 2

bilaminar disc (epiblast, hypoblast)

Answer 2

within week 2, 2 layers

Question 3

gastrulation forms trilaminar embryonic disc

Answer 3

within week 3, 3 layers

Question 4

neural tube formed by neuroectoderm and closes by week 4

organogenesis

susceptible to teratogens

Answer 4

weeks 3-8 (embryonic period)

Question 5

heart begins to beat
upper and lower limb buds begin to form

4 weeks, 4 limbs and 4 heart chambers

Answer 5

week 4

Question 6

fetal cardiac activity by transvaginal ultrasound

Answer 6

week 6

Question 7

fetal movements start

gait starts

Answer 7

week 8

Question 8

genitalia have male/female characteristics

tenitalia

Answer 8

week 10