While describing sample processing, the RN refers to the process of inoculation. He explains that the sample is introduced to a nutrient-rich substance capable of sustaining microbe growth. What is the name of this sterile substance that allows for microorganism multiplication

A culture or growth medium

Explanation: A culture or growth medium contains essential nutrients that aids in the growth of microorganisms. A culture medium can be in liquid form or solid form. It is very important to make sure that a culture or growth medium is sterile and free from any form of contamination. The main function and importance of a culture or growth medium is to ensure that microorganisms grow in a sterile environment that has all the major and essential nutrients required for their growth and to preserve them against any form of harm or contamination such that when these organisms are needed they can be used.

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.