The release of an egg into the sperm cellThe fusion of a male and a female zygoteThe release of sperm cells into the eggThe fusion of a male and a female gamete
Fertilisation is when male and female gametes fuse together.
The uterusThe ovaryThe fallopian tubeThe vagina
An egg travels through the fallopian tube, and if a sperm cell is present, it may fertilise the egg.
Up to 1 monthAround 3-4 daysAround 5-7 daysAround 24 hours
Studies show that sperm can survive for up to five days, and the NHS says it might even be able to live for seven days.
The male and female gametes join together to form a zygote, which then goes on to form an embryo.
The sperm and the egg each contain 23 chromosomes. When the egg is fertilised it contains 46 chromosomes, arranged as 23 pairs.
The vaginaThe ovaryThe fallopian tubeThe uterus
During menopauseDuring menstruationDuring ovulationDuring oestrogen
The egg is released during ovulation.
By killing the spermBy preventing ovulationBy causing menopauseBy blocking ejaculation
The Pill is a contraceptive that uses hormones to prevent ovulation.
The egg travels back to the ovaryThe egg waits until a sperm arrivesThe egg breaks apartThe egg travels back up the fallopian tube
If an egg is not fertilised it disintegrates, and the thickened lining of the uterus is shed, resulting in a period.
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