Reproduction

Superfecundation

female gets pregnant by more than one sire during one pregnancy

Superfetation

pregnant female has a second pregnancy during the ongoing pregnancy so the babies are developing at different gestational ages

outermost cells that become placenta

• endoderm

• mesoderm

• ectoderm

Canine puberty ages

7-12 months

Length of canine estrous cycle

averages 6-7 months

Estrous cycle phases

• proestrus

• estrus

• diestrus

• anestrus

Proestrus

time leading up to estrus

Estrus

Time of sexual receptivity and mating

Diestrus

Time of pregnancy establishment

Anestrus

Time when female is not undergoing reproductive events

parturition

birth

Time of birth in the estrous cycle

occurs between diestrus and anestrus

Gestation time

60-63 days

time pregnancy can be diagnoses via ultrasound (canine)

21-28 days

time pregnancy can be diagnoses via radiographs (Canine)

after 43 days

whelping time concerns

should not be more than 2 hours between puppies

Dystocia

difficult birth. rare in cats

Feline puberty age

4-12 months for 5-6lb female

Induced ovulators

ovulation induced by actual act of mating, only after is the egg released. species: cat

time pregnancy can be diagnoses via ultrasound (feline)

heartbeat at 16 days

time pregnancy can be diagnoses via radiograph (feline)

after 40 days

why mothers lick the babies

• stimulates blood flow

• get babies breathing