The Great Sperm Race Part three – The Fallopian Tube

By | May 1st, 2015|

Once sperm reach the relative safety of the Fallopian tubes, their journey to the egg is nearly over. However, success at this stage will rely on precision timing and the abilities of sperm to detect subtle cues and signals from the woman’s body and the egg. Their job is not quite done. It is interesting to think about how many sperm actually get this far. Of the many millions that a man might ejaculate into his partner’s vagina, perhaps only 50 sperm will actually cross the threshold into the Fallopian tubes. This may seem very wasteful, but those sperm that [...]

The Great Sperm Race Part one – the Cervix

By | April 24th, 2015|

Have you ever wondered why men need to produce so many sperm? Women typically release only one egg per month, but when men ejaculate many millions of sperm are unleashed. If a man produces too few sperm, then his risk of infertility increases markedly. To understand why, we need to take a closer look at the journey sperm have to make inside a woman's body and the many pitfalls and hazards they will encounter along the way. The journey begins with ejaculation. At the climax of intercourse, sperm are deposited high in the vagina, close to the cervix and the [...]