Conception occurs when the males sperm fertilises the females egg. For this to occur they must meet.
For the woman – her egg is released from the ovary during ovulation. It floats into the fallopian tube where it stays for its short life.
For the man – Sperm can live for up to 72 hours although the average life span of a sperm is 16-18 hours.
To make this happen – observe your body and its fertile mucus – when the mucus is wet and profuse have intercourse so that the sperm can make it way into the fallopian tube where it is ready to greet and fertilise the emerging egg.
The arduous journey of the Sperm
Although men produce on average 280-400 million sperm in each ejaculation. The sperm must undertake a difficult journey to reach the egg. It takes about 30-60 minutes for the sperm to reach the fallopian tubes.
Once deposited into the vagina, they need to swim into the cervix, through the uterus and choose which fallopian tube the egg will be waiting in.
Some sperm are abnormal – they can’t swim properly, are two slow or damaged. Some sperm get lost in the uterus swimming round and round, some choose the wrong fallopian tube and some get caught in the cervical crypts. So even though a huge number of sperm start the journey not all the sperm make it to the end.
And if its the wrong time of the month – when the woman is not fertile and does not have any fertile mucus (and it is not her lunar fertile time) then the sperm may not get into the cervix at all.