Explain the energy transformation that occurs when a person exercises. Magnetic energy transforms into mechanical energy.
Electrical energy transforms into mechanical energy.
Mechanical energy transforms into thermal energy.
Thermal energy transforms into electrical energy.

Mechanical energy transforms into thermal energy

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.