Levonorgestrel is a type of medication used in this clinical trial to prevent ovulation, which means it helps stop the release of an egg from the ovary. This medication is taken in the form of a tablet every day. The trial is designed to see if this medication can still prevent ovulation even if there are planned delays in taking the tablets. This means that the study is checking if the medication is effective even when the schedule for taking it is not followed exactly. Levonorgestrel is often used in birth control pills and works by changing the way hormones in the body function to prevent pregnancy. In this trial, the focus is on understanding how well it works when the intake schedule is not perfect.

Ovulation Inhibition – Ovulation inhibition refers to the prevention of the release of an egg from the ovary. This process is a key mechanism in hormonal contraception, where specific hormones are used to suppress the natural menstrual cycle. The inhibition is achieved by altering the hormonal signals that trigger ovulation, primarily through the use of progestins. When ovulation is inhibited, the likelihood of fertilization and pregnancy is significantly reduced. The process involves maintaining hormone levels that prevent the maturation and release of eggs. This method is effective as long as the hormonal levels are consistently maintained.