OB NURS 306 REAL EXAM Questions with
100% Verified Answers Latest Versions 2025
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1. ductus venosus: connects umbilical vein to inferior vena cava --> right atrium
2. foramen ovale: opening between R & L atria, oxygenated blood shunted to L
atrium. Opening will close after birth in response to increased blood returning to
left atrium (may take up to 3 months for full closure PFO
3. ductus arteriosus: pulmonary artery to descending aorta, oxygenated blood
shunted to aorta and small amount to lungs. After delivery, constricts in response
to higher blood O2 levels and prostaglandins (PDA)
4. placenta: formed from fetal and maternal tissue. chorionic villi, decidua
basalis, cotyledons
5. chorionic villi: projections from the chorion that embed into the decidua
basalis and later form the fetal blood vessels of the placenta
6. hegar's sign: softening and compressibility of lower uterus
7. Chadwick's sign: deepened violet-bluish color of cervix and vaginal mucosa
8. Goodell's sign: softening of cervical tip
,9. Ballottment: rebound of unengaged fetus
10. braxton hicks contractions: false contractions; painless, irregular, and usu-
ally relieved by walking
11. fundal height measurement: approximates gestational age. cm from symph-
ysis pubis to the top of the uterine fundus (between 18 & 32 weeks gestation)
12. gravidity: number of pregnancies
13. nulligravida: a woman that has never been pregnant
, 14. primigravida: a woman in her first pregnancy
15. multigravida: a woman who has had two or more pregnancies
16. parity: number of pregnancies in which the fetus or fetuses reach viability
(approximately 20 weeks) regardless of whether the fetus is born alive
17. maternal tissue: decidua basalis, cotyledons
18. function of placenta: metabolic and gas exchange, hormone production (es-
trogen, progesterone, HCG, hPL)
19. drugs: cross membrane, Rx with category C, D, or X should be avoided
20. amnion and chorion: form the amniotic sac (bag of waters)
21. amniotic sac function: embryo and amniotic fluid are contained within embry-
onic sac, membranes stretch to accommodate the growth of developing fetus and
increase amniotic fluid
22. components of amniotic fluid: clear, water, proteins, carbs, lipids, elec-
trolytes, fetal cells, lanugo, vernix caseosa
23. 2nd and 3rd trimester amniotic fluid: produced by fetal kidneys
24. function of amniotic fluid: cushion, prevents adherence to amniotic mem-
brane
100% Verified Answers Latest Versions 2025
TOP RATED A+
1. ductus venosus: connects umbilical vein to inferior vena cava --> right atrium
2. foramen ovale: opening between R & L atria, oxygenated blood shunted to L
atrium. Opening will close after birth in response to increased blood returning to
left atrium (may take up to 3 months for full closure PFO
3. ductus arteriosus: pulmonary artery to descending aorta, oxygenated blood
shunted to aorta and small amount to lungs. After delivery, constricts in response
to higher blood O2 levels and prostaglandins (PDA)
4. placenta: formed from fetal and maternal tissue. chorionic villi, decidua
basalis, cotyledons
5. chorionic villi: projections from the chorion that embed into the decidua
basalis and later form the fetal blood vessels of the placenta
6. hegar's sign: softening and compressibility of lower uterus
7. Chadwick's sign: deepened violet-bluish color of cervix and vaginal mucosa
8. Goodell's sign: softening of cervical tip
,9. Ballottment: rebound of unengaged fetus
10. braxton hicks contractions: false contractions; painless, irregular, and usu-
ally relieved by walking
11. fundal height measurement: approximates gestational age. cm from symph-
ysis pubis to the top of the uterine fundus (between 18 & 32 weeks gestation)
12. gravidity: number of pregnancies
13. nulligravida: a woman that has never been pregnant
, 14. primigravida: a woman in her first pregnancy
15. multigravida: a woman who has had two or more pregnancies
16. parity: number of pregnancies in which the fetus or fetuses reach viability
(approximately 20 weeks) regardless of whether the fetus is born alive
17. maternal tissue: decidua basalis, cotyledons
18. function of placenta: metabolic and gas exchange, hormone production (es-
trogen, progesterone, HCG, hPL)
19. drugs: cross membrane, Rx with category C, D, or X should be avoided
20. amnion and chorion: form the amniotic sac (bag of waters)
21. amniotic sac function: embryo and amniotic fluid are contained within embry-
onic sac, membranes stretch to accommodate the growth of developing fetus and
increase amniotic fluid
22. components of amniotic fluid: clear, water, proteins, carbs, lipids, elec-
trolytes, fetal cells, lanugo, vernix caseosa
23. 2nd and 3rd trimester amniotic fluid: produced by fetal kidneys
24. function of amniotic fluid: cushion, prevents adherence to amniotic mem-
brane
