<span>When you are pregnant, you do not ovulate because you have already fertilized an egg and it is embedded into the uterus where it is growing into a baby. The body knows this, so it does not shed the uterine lining. The shedding of this lining is triggered by hormones which change when the body is pregnant. During pregnancy, a large amount of progesterone is initially produced which helps to prevent the lining from shedding. If you are not pregnant, your progesterone level will begin to decline at the end of your cycle, triggering the shedding of the lining and the period. Birth control pills alter your hormones to mimic a pregnant state. This will prevent the body from releasing an egg and then shedding the uterine lining.</span>
A virus that infects and replicates itself within bacteria.
Answer: It is an amino acid that cannot be made by the body. It must be obtained from eating certain foods.
Explanation:
Answer:
defines the problem to be explored
C) Lactic acid and energy
This is the reason we feel a burning sensation during strenuous exercise.
