hey can someone tell me which body systems they use (at least 4 or 5) and tell me what the body system is doing? please, sorry if it’s a lot

hello there,

guys i’m confused.

which rock will weather faster?

answer: b rock

your answer is "the 1950's"

explanation:

idk

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.