Which of the following sentence best describes a buffer? a. buffers resist change in ph of solutions by neutralizing excess acid or base. b. buffers change the ph of solutions by increasing acidity or basicity of solutions. c. buffers change the ph of solutions by decreasing acidity or basicity of solutions.

yes you are doing it right great gob

explanation:

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.