Rh disease & multifetal gestation

Question 1

Positive Rh (D) Ab screening consists of

Answer 1

serial Ab titres q2-4weeks

Question 2

what can U/S show as indicator of hydrops?

Answer 2

visualizations of fetal bowel w/ small amts of intraabd fluid

Question 3

what does the liley curve tell you?

Answer 3

fetal anemia

Question 4

One dose of _____ Rhogam will cover ____ of fetal whole blood in maternal circulation

Answer 4

300mcg; 30ml

Question 5

what test tells you the % fetal RBC in maternal circulation?

Answer 5

Kleihauer-Betke Test

Question 6

incidence of multifetal gestation

Answer 6

1/90

Question 7

division of the conceptus within 3 days of fertilization

Answer 7

Diamniotic/Dichorionic

Question 8

division occurs between 4-8 days. Chorion has already begun to develop but amnion has not

Answer 8

Diamniotic/Monochorionic

Question 9

1% of monozygotic gestations, division occurs between days 9-12 after development of both amnion and chorion so they share a common sac.

Answer 9

Monoamnionic/Monochorionic

Question 10

division occurs incompletely

Answer 10

conjoined

Question 11

dx of multifetal pregnancy

Answer 11

size > dates

Question 12

does monochoriionic or dichorionic gestation have greater M & M?

Answer 12

monochorionic

Question 13

what syndrome is due to arterio-venous anastomosis?

Answer 13

twin-twin transfusion syndrome