Reproductive Hormones and Gestation Flashcards
Hormone
Chemical released into the blood and transported to affect cells in other parts of the body
Hormones regulate
Growth and development Male and female sexual development How the body uses energy Level of sugar and salts in the body Amount (volume) of fluid in body
Puberty
Process of physical changes by which an animal’s body becomes an adult capable of reproduction
Puberty is initiated by
Hormones from the brain to the reproductive system (to either ovaries or testes)
Then organs create a variety of hormones stimulating growth, function, or transformation of the brain, bones, muscles, skin…
Growth during puberty accelerates
in the 1st half puberty and stops at the completion of puberty
Estrogen
Location, Function, Characteristics
Location: mostly females
Function : controls different stages of the reproductive cycle and (in females) controls development of 2nd sex characteristics
Characteristics : Promotes normal bone development
Testosterone
Function, Important for
*Steroid hormone
Function : Controls development of male reproductive organs, 2nd sex characteristics, and sex drive
Important in : bone mass development, prevention of osteoporosis
Fertilization
When sperm and egg unite, then cell division occurs
Attachment
Embryo that has been through much cell division attaches self to uterus for further development
Embryotic Stage
Period when body parts and organs start to form
Fetal Stage
Period lasts until birth mainly time when body parts and organs start to mature
Gestation
Length of pregnancy
Cattle Average Gestation
279-292 days
9 months
Goat Average Gestation
145-155 days
5 months
Sheep Average Gestation
144-151 days
5 months
