The ovarian cycles regulate the reproductive system in females.

Business cycles are a natural part of the economy.

The Calvin cycles are essential for photosynthesis.

The carbon cycles in the atmosphere and the ocean play a crucial role in regulating Earth's climate.

The cycle chords on the bicycle were loose.

The duty cycles of the two machines are different.

Female mammals experience multiple estrous cycles throughout their reproductive years.

The system exhibits multiple limit cycles.

The lytic cycles of the virus are responsible for the destruction of host cells.

The lysogenic cycles play a crucial role in the life cycle of the bacteriophage.