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50 Cards in this Set
- Front
- Back
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first parturition |
Primiparous |
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Many parturitions |
Pluriparous |
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one ovum |
uniparous |
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many ova |
multiparous |
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Bovine Gest |
9 months |
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Equine Gest |
11 months |
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Sheep Gest |
5 months |
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Swine Gest |
3,3,3 |
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Canine Gest |
2 months |
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Feline Gest |
2 months |
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Mouse Gest |
10-20 |
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Hamster Gest |
16-19 |
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Rat Gest |
22-23 |
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Rabbit Gest |
30-32 |
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Single sperm enters the ovum |
Fertilization |
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Zygote undergoes division to form a __ |
Morula |
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Morula divides and is now called a ___ |
blastocyst |
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Becomes GIT, liver and lung |
endoderm |
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becomes cardiovascular, musculoskeletal and repro systems |
mesoderm |
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becomes hair, skin, nervous system |
ectoderm |
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The blastocyst attaches to the lining of the uterus |
Implantation |
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membrane immediatley around fetus |
Amnion |
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Layer around amnion with allantoic fluid |
Allantois |
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covers outside of allantoic sac and attached to the uterine lining |
Chorion |
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Unoxygenated blood plus wastes from fetus to placenta |
Umbilical arteries |
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Nutrients and O2 from placenta to fetus Only vein that is oxygenated |
Umbilical vein |
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from fetal bladder to allantoic sac |
Urachus |
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bypasses liver to the caudal vena cava and right atrium |
ductus venosus |
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Half blood flow goes through ___ and ____ |
foramen ovale, right atrium |
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Umbilical vein becomes a round ligament of the _____ |
liver |
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Umbilical artery becomes ligament of the ___ |
bladder |
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Urachus becomes the ventral ligament of the ___ |
bladder |
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Ductus venosus and arteriosus close in __- |
5-30 minutes |
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Foramen ovale closes in ___ |
5-30 minutes |
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Cotyledonary |
bovine ovine |
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diffuse |
equine porcine |
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zonary |
canine feline |
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discoid |
primates rodents rabbit humans |
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Maternal portion |
caruncle |
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Fetal portion |
Cotyledon |
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caruncle and cotyledon |
placentome |
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fetal pituitary causes rising levels of ___ |
cortisol |
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levels rise 12-24 hours before parturition |
estrogen |
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lyse corpus luteum progesterone levels fall increases uterine activity and release of oxytocin |
Prostaglandins |
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Cause uterine contractions when estrogen is present milk letdown |
Oxytocin |
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produced by pregnant animals which helps ligament to relax and stretch |
relaxin |
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uterus returns to regular size |
involution |
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mixture of blood and sloughed endometrium |
lochia |
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embryo absorbed with no visible signs |
early embryonic death |
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unable to survive, expel fetus from uterus |
abortion |
