According to WebMD, the fastest sperm can get to a fallopian tube is about 30 minutes, meaning that the quickest conception could occur following sex is in the half-hour range . This means that, following sex, the egg could be fertilized before you've gotten up to get a drink of water.
According to Harms, conception can occur as many as five days after sex or possibly longer, as strong, healthy sperm can survive for about that many days (and perhaps even longer) in the supportive environment of the fallopian tubes as they wait for an egg to be released, if one isn't already present. Here's how it works: Fertilization happens in one of the fallopian tubes, which carries an egg from an ovary to the uterus. It can take up to seven days after intercourse for sperm and egg to join and become a fertilized egg. Usually, it's because the sperm gets into the fallopian tube before the egg is released.
Here is more from Answers.com contributors:
Yes, there is a chemical attraction to the egg, the egg has a protein sperm swim towards.
It takes sperm approximately 30 minutes to 12 hours to reach and fertilize an egg after ejaculation. The journey depends on factors such as the distance between the cervix and the egg, as well as the quality and motility of the sperm.
Only males have sperm. There is no such thing as female sperm.
No, sperm do not take three months to reach the egg. Once sperm are ejaculated, they can swim through the female reproductive tract and reach the egg within a few hours to a few days. However, sperm can survive in the female body for up to five days, allowing for a window of time for fertilization to occur after intercourse. The actual process of fertilization happens almost immediately once sperm encounters a viable egg.
After ejaculation, sperm can reach the fallopian tubes within minutes to a few hours. An egg is usually released from the ovary into the fallopian tube during ovulation and can be fertilized by sperm within 12-24 hours of ovulation.
Sperm can typically survive in the female reproductive tract for up to five days. After intercourse, it usually takes a sperm around 6-12 hours to reach the fallopian tubes where fertilization of the egg can occur if timing is right.
No, sperm does not always reach the egg during fertilization. Only one sperm typically fertilizes the egg, while the rest are blocked from entering.
the sperm just die
No, sperm must travel through the fallopian tubes to reach and fertilize an egg. Without the tubes, the sperm cannot reach the egg for fertilization to occur.
During fertilization, sperm reach the egg with the help of their tail movement and enzymes that break down the egg's outer layer.
Yes, it is possible for 2 sperm to reach the egg, however only one will fertilize the egg. It isn't uncommon for more than 2 to reach the egg, depending how are along the egg is down the falopian tube. And how much sperm was ejaculated.
If there is no egg present in the oviduct when the sperm arrive, the sperm will typically die off and be naturally cleared from the body. They have a limited lifespan and cannot survive for long periods within the female reproductive system without encountering an egg for fertilization.
Sperm only live up to a maximum of three days. But they also have to REACH the egg which they can do within an hour. Therefore fertilisation could happen in one hour after sex, or if you had sex yesterday, the sperm could be lying in wait for the egg to come to them!