MATCH: Hypothesis: Theories: Observation: Variable general explanations supported by many experiments and observations: makes predictions that are testable: the act of viewing the world around us: is something that is manipulated in an experiment.

Hypothesis: make predictions that are testable

Theories: Variable general explations supported by many experiments and observations

Observation; the act of viewing the world around us

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.