Examlex
In positive reinforcement the response is strengthened as a result of the presentation of an unpleasant stimulus; in negative reinforcement a response is strengthened as a result of the removal of a desirable stimulus.
Embryo
An early stage of development in multicellular organisms, in humans, it refers to the period from fertilization until the eighth week of pregnancy.
Fetus
A fetus is the term for an unborn offspring from the eighth week after fertilization until birth, characterized by rapid growth and development of bodily structures.
Diethylstilbestrol
A synthetic estrogen once prescribed to prevent miscarriages and pregnancy complications but later found to cause cancer and other severe health issues.
Estrogen
A female sex hormone produced mainly by the ovaries.
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