The following diagram illustrates the menstrual cycle. It also shows the changing ... an egg is released from a follicle in the ovaries - this is ovulation. If this egg is fertilised and embeds ...

The menstrual cycle has four phases: menstrual, follicular, ovulation, and luteal. The main purpose of the menstrual cycle is to produce an egg for potential fertilization by sperm. Stress ...

Scroll through a month and monitor the changing balance of hormones in a woman's reproductive cycle. Then "take the pill" to see how synthetic hormones adjust this balance and prevent ovulation.

The closer your cycle is to ovulation, the more likely you are to become pregnant during penis-in-vagina sex without a barrier method. Sperm can live inside your uterus for up to 5 days after ...