Maybe those are the mistakes we make

A woman’s egg only lives for about 12 hours after it is released. This means that a woman’s egg needs to be fertilized within this 12-hour time frame. Furthermore, freshly ejaculated sperm are not able to fertilize a woman’s egg. It takes time for a process known as capacitation to occur. Capacitation is series of changes that sperm go through once they are inside a woman’s reproductive tract that make sperm more mobile and allow them to penetrate the egg. It can take up to 10 hours for a man’s sperm to complete the capacitation process and be able to fertilize a woman’s egg. This is why the five days before ovulation are so important. Once ovulation takes place, sperm have a very brief window of time to fertilize the egg. Having mature sperm (sperm that have gone through the capacitation process already) ready for the waiting egg is the key to successful conception.