You and your partner arrive at the scene of a fire at a large office complex. witnesses tell you that they heard a loud explosion shortly before the building caught fire. you should:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

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.