Chapter 19 The Reproductive System

Uniparous species

• ovaries produce one mature ovum per cycle

  • horses, cattle, humans

Multiparous species

• ovaries produce multiple ova per cycle

  • cats, dogs, and sows give birth to a litter

• Induced ovulators

  • ovulation occurs after breeding

cats, camels, rabbits, ferrets

infundibulum

catches egg and feeds it to the ovaducts

endometrium

where implantation of the fertilized egg occurs

myometrium is ____ muscle

smooth

the cervix

Smooth muscle sphincter between body of the uterus and the vagina

when is the cervix not tightly closed

during estrus (heat)

during parturition

Estrus

definite period during the Estrous Cycle in each reproductive cycle when breeding can take place

Estrous

the time from the beginning of one heat period to the beginning of the next (the whole cycle)

The Estrous Cycle is Controlled by

hormones FSH and LH

Polyestrous

cattle, swine

Seasonally polyestrous

horses, sheep, cats

Diestrous

dogs

Monoestrous

foxes, minks

4 phases of the estrous cycle

Proestrus

estrus

Diestrus

Anestrus

Proestrus

Time leading to estrus

Estrus

Time of sexual receptivity and mating

Diestrus

Time of pregnancy establishment

Anestrus

Time when female is not undergoing reproductive events