Ovulation typically occurs days before the menstrual period begins.

Ovulation usually happens 12 to 16 days before the menstrual period begins.

Explanation:

Ovulation is nothing more than the process of the release of an egg by the woman's body. This is a process that occurs with each menstrual cycle through hormonal changes proper to the female body. The woman's body raises luteinizing hormone (LH) to stimulate the ovary to release an egg from its reserve. Thus, ovulation usually occurs 24 to 48 hours after this hormone increases. In addition, ovulation usually occurs 12 to 16 days before the start of the next menstrual period.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger