Pregnant female reproductive physiology quiz

1

What is the length of gestation in the sow?

2

What is the length of gestation in the cow?

3

What is the length of gestation in the ewe?

4

What is the length of gestation in the mare?

5

Approximately how long does the second stage of parturition last in the mare?

	20 minutes
	30 minutes - 4 hours
	30 minutes - 2 hours
	6 hours
	3 hours
Please select an option Correct. In the mare, the foal should be delivered within approximately 20 minutes of the rupture of the allantochorion. If the second stage exceeds this time, then immediate obstetric intervention is recommended. WikiVet Article: parturition. Incorrect. The second stage of parturition takes between about 30 minutes to 4 hours in the cow. In the mare, the foal should be delivered within approximately 20 minutes of the rupture of the allantochorion. If the second stage exceeds this time, then immediate obstetric intervention is recommended. WikiVet Article: parturition. Incorrect. The second stage of parturition takes between about 30 minutes to 2 hours in the ewe. In the mare, the foal should be delivered within approximately 20 minutes of the rupture of the allantochorion. If the second stage exceeds this time, then immediate obstetric intervention is recommended. WikiVet Article: parturition. Incorrect. The second stage of parturition takes around 6 hours in the bitch. In the mare, the foal should be delivered within approximately 20 minutes of the rupture of the allantochorion. If the second stage exceeds this time, then immediate obstetric intervention is recommended. WikiVet Article: parturition. Incorrect. The second stage of parturition takes approximately 3 hours in the sow. In the mare, the foal should be delivered within approximately 20 minutes of the rupture of the allantochorion. If the second stage exceeds this time, then immediate obstetric intervention is recommended. WikiVet Article: parturition.

6

What is the bovine maternal recognition of pregnancy factor?

	Unidentified
	Prolactin
	Interferon τ
	Progesterone
	Oestrogen
Please select an option Incorrect. In the mare, the conceptus does produce proteins to effect the recognition of pregnancy, but specific roles are unknown. Cattle blastocysts produce a small protein called bovine interferon tau (BIFN-τ)from day 13-21 after ovulation. It binds to the uterine endometrium and inhibits the synthesis of oxytocin receptors. As a result, there is no production of the luteolytic factor PGF2α and the corpus luteum is maintained. WikiVet Article: maternal recognition of pregnancy. Incorrect. The lifespan of the corpora lutea in a pregnant queen is extended to ~60 days by the action of pituitary prolactin. There is no need for a conventional 'maternal recognition of pregnancy'. Cattle blastocysts produce a small protein called bovine interferon tau (BIFN-τ)from day 13-21 after ovulation. It binds to the uterine endometrium and inhibits the synthesis of oxytocin receptors. As a result, there is no production of the luteolytic factor PGF2α and the corpus luteum is maintained. WikiVet Article: maternal recognition of pregnancy. Correct! Cattle blastocysts produce a small protein called bovine interferon tau (BIFN-τ)from day 13-21 after ovulation. It binds to the uterine endometrium and inhibits the synthesis of oxytocin receptors. As a result, there is no production of the luteolytic factor PGF2α and the corpus luteum is maintained. WikiVet Article: maternal recognition of pregnancy. Incorrect. Cattle blastocysts produce a small protein called bovine interferon tau (BIFN-τ)from day 13-21 after ovulation. It binds to the uterine endometrium and inhibits the synthesis of oxytocin receptors. As a result, there is no production of the luteolytic factor PGF2α and the corpus luteum is maintained. WikiVet Article: maternal recognition of pregnancy. Incorrect. The pig conceptus produces oestradiol as the signal for maternal recognition of pregnancy. Cattle blastocysts produce a small protein called bovine interferon tau (BIFN-τ)from day 13-21 after ovulation. It binds to the uterine endometrium and inhibits the synthesis of oxytocin receptors. As a result, there is no production of the luteolytic factor PGF2α and the corpus luteum is maintained. WikiVet Article: maternal recognition of pregnancy.

Pregnant female reproductive physiology quiz/ 9

7

For which domestic species is the corpus luteum the principal source of progesterone throughout the whole pregnancy?

	Cat
	Sheep
	Guinea pig
	Horse
	Pig
Please select an option Incorrect. The corpus luteum is the principal source of progesterone for 79% of the queen's pregnancy and during the remaining 21%, the placenta is the principal source. The corpus luteum is the principal source of progesterone for 100% of the sow's pregnancy. WikiVet Article: endocrine control of parturition. Incorrect. The corpus luteum is the principal source of progesterone for 37% of the ewe's pregnancy and during the remaining 63%, the placenta is the principal source. The corpus luteum is the principal source of progesterone for 100% of the sow's pregnancy. WikiVet Article: endocrine control of parturition. Incorrect. The guinea pig depends on placental progesterone during late pregnancy. The corpus luteum is the principal source of progesterone for 100% of the sow's pregnancy. WikiVet Article: endocrine control of parturition. Incorrect. The corpus luteum and accessory CL's is the principal source of progesterone for 61% of the mare's pregnancy and during the remaining 39%, the placenta is the principal source. The corpus luteum is the principal source of progesterone for 100% of the sow's pregnancy. WikiVet Article: endocrine control of parturition. Correct! The corpus luteum is the principal source of progesterone for 100% of the sow's pregnancy. WikiVet Article: endocrine control of parturition.

Pregnant female reproductive physiology quiz

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