Some gases are lighter than air. Hydrogen is the lightest of all, and easily manufactured, even at home -- for example by dropping aluminium foil into a solution of sodium hydroxide (highly dangerous because it will spit droplets of hot caustic liquid at you which may blind you permanently if they land in your eyes).
The corpus luteum is essential for establishing and maintaining pregnancy in females. The corpus luteum secretes progesterone, which is a steroid hormone responsible for the decidualization of the endometrium (its development) and maintenance, respectively. It also produces relaxin, a hormone responsible for softening of the pubic symphysis which helps in parturition.
  The hormone hCG is produced from the syncytiotrophoblast cells of the developing embryo. This hormone is responsible for maintaining the corpus luteum during pregnancy f â¦ or 3-4 months so that the corpus luteum continues to produce progesterone.Progesterone is needed to prevent a menstual cycle while pregnant.rogesterone is the primary hormone produced in the corpus luteum. Secondary is estrogen.