Which hormone is sometimes reffered to as the pregnancy hormone? why?

Answer 1

hCG, human chorionic gonadotropin, it is called that because this is the hormone that the developing placenta produces.

Answer 2

hCG is the hormone most commonly used to diagnose pregnancy. It is sometimes known specifically as "the pregnancy hormone". See: http://www.americanpregnancy.org/duringpregnancy/hcglevels.html

Progesterone is the major hormone most closely associated with the maintenance of the pregnancy (gestation and embryogenesis). See:
http://en.wikipedia.org/wiki/Progesterone

Answer 3

Progesteron secreted by ovaries is known as the pregnancy hormone b/c it maintains the pregnancy. its the follicle stimulating hormone which effect ovaries to secret progesteron.
if it will decrease from a certain level then it may results into abortion.