birth Flashcards
(13 cards)
what is the oviparous process of reproduction
eggs hatch outside body
develop outside body
nourishment for development provided by the predetermined quantity of yolk
what is the ovoviviparous process of reproduction
eggs hatch in body without obtaining nourishment from it
develops inside body
what is the viviparous process of reproduction
giving birth to living offspring that developed in body
nourishment provided by body
what is the monotremes process of reproduction
5 species
egg laying mammals
produce milk but no nipples
what is the marsupial process of reproduction
born alive but live in pouch until fully developed
short gestation period
born hairless, blind and pink, crawl into pouch and remain there until deleloped
females have 2 vaginas, same entrance but go to different parts of uterus
males have 2 pronged penis and testicles in front of penis
what is parturation
giving birth
what is prolaction
initiates and sustains lactation
what happens in the preparation stage of parturation
Progesterone decreases
Vaginal tissue relaxes
what happens in the first stage of parturation
contractions
Milk present in mammary glands
Cervix begins to dilate and first foetus pushes against it
what happens in the second stage of parturation
Uterine contractions increase in intensity
Foetus is propelled through the cervix into the vagina initiating abdominal straining
Foetus is born with the amnion (sac)
what happens in the third stage of parturation
placenta is passed
what happens in the puerperium stage of parturation
reproductive tract returns to its normal state via uterine involution
what is copulation
the act of mating in vertebrates
