Test 4: pregnancy handout Flashcards
-mammals that give birth to a single offspring at a time
Monotocous
-female that has had at least one previous successful pregnancy and parturition, can also refer to a female that gives birth to more than one offspring at a time (litter bearer)
Multiparous
-female that has not become pregnant
Nulliparous
___-mammals that give birth to multiple offspring (litter bearers)
Polytocous
___-first parity or pregnancy
Primiparous
___-female who has had one pregnancy and parturition, also can refer to a female that gives birth to only one offspring at birth
Uniparous
___ – in early stage of development and not recognizable as a specific species
Embryo
___– late stage of development, organogenesis is completed and recognizable as specific specie
Fetus
___ – entire product of conception, includes both the embryo and its extraembryonic membranes or the fetus and its placenta
Conceptus
___ – offspring delivered alive (as opposed to oviparous – offspring delivered as an egg)
Viviparous
Fertilization to start of primitive fetal membrane development.
Embryo
organogenesis in cow
Cow 12-45 days
organogenesis in mare
12-60 days. (heart beat at 22 days)
organogenesis in ewe
11-34 days
Ewes ovulate ___ the start of heat.
24 hours after
Does ovulate ___ after the start of heat
12-36 hours
Ewes ovulate ___ after the start of heat. Does ovulate ___ after the start of heat. Sows ovulate after the start of heat
24 hours
12-36 hours
24-42 hours
Being an ___ovulator, the queen does not ovulate until 25-50 hours after breeding.
induced
In general, gestation length is inversely related to litter size (exception sow). Twin calves are carried ___than a single calf.
3-6 days less
