What is the name of the gas animals breathe out?

carbon dioxide

i think

The gas is called carbon dioxide. Because they breathe in oxygen then let out carbon dioxide that is put into the atmosphere.

Hope this helps :)

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.