How does conception happen?
Conception happens when sperm joins a healthy egg, usually by swimming up through the vagina. Simply speaking, conception happens when sperm and egg meet each other. But for this to happen, this meeting needs to occur at the proper time, place, and circumstances (ovulation). During ovulation, the ovaries release one or more eggs, which travel down one of the uterine tubes toward the uterus.
Ovulation typically occurs 12 to 16 days before your next period, but the exact timing can vary from month to month. In 2020, Flo collaborated with the University of Adelaide to conduct a large study on cycle length. It showed that only one in seven females in the study ovulated on the 14th day of their cycle.
Sometimes, ovulation might occur twice within one cycle, or an egg could be released from the ovary right before a period. Once the egg is released, it can live for 12 to 24 hours. Because sperm can live inside the female reproductive system for up to five days, the five days leading up to ovulation and the day after are known as the fertile window.
The fertile window is when it’s possible to get pregnant. The precise timing of the fertile window can be difficult to predict. Tracking your cycle with Flo and using ovulation kits can help you predict the timing of your fertile window more accurately.
Millions of sperm are released in each ejaculation. Most or almost all of them will die on the journey toward the egg, but it only takes one sperm fertilizing an egg for conception to happen.