Hai has been taking expensive beta-carotene supplements for years, because he believes they will reduce his risk of cancer. hai has just learned that a well-controlled study published in the prestigious new england journal of medicine showed that beta-carotene supplements do not reduce cancer risk. hai is probably experiencing

an emotional dilemma or cognitive dissonance

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.

atp is used for energy.