The short answer is that the egg and sperm can meet within minutes to up to 12 hours after ejaculation. Sperm can reach the egg in about an hour, while the entire fertilization process can take several hours. The amount of time that it takes to get pregnant after sex depends on individual circumstances
When Does Ovulation Occur? – Knix
Conception can occur in hours or days, and implantation usually happens about a week later.
A sperm can fertilize the egg within minutes of having sex, though it can take up to five days for fertilization to occur
Conception can happen within minutes or up to five days after sex, depending on when you ovulate Identifying your fertile window and when you ovulate can improve your chances of conceiving if. There is a very small window of time after ovulation for the sperm to fertilize the egg, usually within 24 hours Fertilization occurs in this time frame, otherwise, the unfertilized ovum ends in menses (4)
Therefore the conditions and the timing have to be correct and exact for fertilization. Contrary to what many people believe, fertilization doesn’t occur immediately after sex
