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Ansc 4043 Endocrinology of
Pregnancy and Parturition Exam
Questions with Verified Solutions
100% Correct Graded A+
Fertilization takes place in the Ans: oviduct
Blastocyst stage gives rise to Ans: inner cell mass and trophoblast
Inner cell mass= Ans: embryo proper (baby)
Trophoblast= Ans: extra-embryonic membrane (chorion placenta)
Timing of blastocyst development and passage into uterus is variable among
Ans: species
Functional Corpus Luteum is necessary for _____________ and ________________ of
pregnancy which Produces _______________ to support pregnancy Ans:
establishment, maintenance, progesterone
For Maternal Recognition of Pregnancy the Conceptus to signal to uterus is to
prevent? Ans: luteolysis
Maternal Recognition of Pregnancy Cues are very Ans: species specific
In Maternal Recognition in Ruminants trophoblast cells secrete? Ans:
interferon-tau (IFN-t)
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In Maternal Recognition in Ruminants IFN-t blocks ____________ receptors in
uterus to prevent __________ Ans: Oxytocin, PGF2a synthesis
In Maternal Recognition in Ruminants IFN-t increases ________ synthesis which
is __________ Ans: prostaglandin E (PGE) , luteotrophic (supports cell, supports
progesterone)
Maternal Recognition in Swine Trophoblast cells secrete estrogen which
reroutes PGF2a to Ans: uterine lumen which has little access to circulation
In Maternal Recognition in Swine Estrogen synthesis also aids in Ans:
myometrium contractions
For Maternal Recognition of Pregnancy to occur in swine, must be at least
How many piglets per uterine horn? If not, what will occur? Ans: 2, luteolysis
Maternal Recognition of Pregnancy factor unknown in mares- Ans:
Proteins/estrogens
In mares Conceptus ______________________________________ are the most obvious
Maternal Recognition of Pregnancy signal Ans: mobility and migration
In mares the Conceptus must "bounce" around entire surface of ________ to
prevent ____________ for first __________ days Ans: luteolysis, uterus, 14-16
In mares Studies involving ligation of one or both horns induces ? Ans:
luteolysis
Maternal Recognition in Women- Trophoblast cells secrete what hormone?
approx how many days after ovulation? Ans: human chorionic gonadotropin
(hCG),
7-9 days after ovulation
Ansc 4043 Endocrinology of
Pregnancy and Parturition Exam
Questions with Verified Solutions
100% Correct Graded A+
Fertilization takes place in the Ans: oviduct
Blastocyst stage gives rise to Ans: inner cell mass and trophoblast
Inner cell mass= Ans: embryo proper (baby)
Trophoblast= Ans: extra-embryonic membrane (chorion placenta)
Timing of blastocyst development and passage into uterus is variable among
Ans: species
Functional Corpus Luteum is necessary for _____________ and ________________ of
pregnancy which Produces _______________ to support pregnancy Ans:
establishment, maintenance, progesterone
For Maternal Recognition of Pregnancy the Conceptus to signal to uterus is to
prevent? Ans: luteolysis
Maternal Recognition of Pregnancy Cues are very Ans: species specific
In Maternal Recognition in Ruminants trophoblast cells secrete? Ans:
interferon-tau (IFN-t)
, 2|Page
In Maternal Recognition in Ruminants IFN-t blocks ____________ receptors in
uterus to prevent __________ Ans: Oxytocin, PGF2a synthesis
In Maternal Recognition in Ruminants IFN-t increases ________ synthesis which
is __________ Ans: prostaglandin E (PGE) , luteotrophic (supports cell, supports
progesterone)
Maternal Recognition in Swine Trophoblast cells secrete estrogen which
reroutes PGF2a to Ans: uterine lumen which has little access to circulation
In Maternal Recognition in Swine Estrogen synthesis also aids in Ans:
myometrium contractions
For Maternal Recognition of Pregnancy to occur in swine, must be at least
How many piglets per uterine horn? If not, what will occur? Ans: 2, luteolysis
Maternal Recognition of Pregnancy factor unknown in mares- Ans:
Proteins/estrogens
In mares Conceptus ______________________________________ are the most obvious
Maternal Recognition of Pregnancy signal Ans: mobility and migration
In mares the Conceptus must "bounce" around entire surface of ________ to
prevent ____________ for first __________ days Ans: luteolysis, uterus, 14-16
In mares Studies involving ligation of one or both horns induces ? Ans:
luteolysis
Maternal Recognition in Women- Trophoblast cells secrete what hormone?
approx how many days after ovulation? Ans: human chorionic gonadotropin
(hCG),
7-9 days after ovulation
