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BuzzFeed Staff

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Do You Actually Know How Babies Are Made?

Fertilisation is when male and female gametes fuse [together.](http://www.ncbi.nlm.nih.gov/books/NBK26843//)

An egg travels through [the fallopian tube, and if a sperm cell is present, it may fertilise the egg.](http://www.nhs.uk/Livewell/Fertility/Pages/Fertilitythefacts.aspx)

Studies show that sperm [can survive](http://humupd.oxfordjournals.org/content/12/1/23.full) for [up to five days,](http://www.nejm.org/doi/full/10.1056/NEJM199512073332301) [and the NHS says it might even be able to live for seven days.](http://www.nhs.uk/Livewell/Fertility/Pages/Fertilitythefacts.aspx)

The male and female gametes join together to form a [zygote, which then goes on to form an embryo.](http://www.ncbi.nlm.nih.gov/books/NBK26843//)

The sperm and the egg each contain 23 chromosomes. When the egg is fertilised [it contains 46 chromosomes, arranged as 23 pairs.](http://www.bbc.co.uk/schools/gcsebitesize/science/21c/genes/inheritancerev1.shtml)

Once fertilised, the egg travels along the fallopian tube and [implants in the uterus.](http://www.nhs.uk/Livewell/Fertility/Pages/Fertilitythefacts.aspx)  

In rare cases, the fertilised egg begins to grow elsewhere, usually in a fallopian tube. This is called an ectopic pregnancy, [and won't result in a baby.](http://www.nhs.uk/Conditions/Ectopic-pregnancy/Pages/introduction.aspx)

The egg is released during [ovulation.](http://www.collinsdictionary.com/dictionary/english/ovulation)

The Pill is a contraceptive that uses hormones to prevent [ovulation.](http://www.nhs.uk/conditions/contraception-guide/pages/combined-contraceptive-pill.aspx)

If an egg is not fertilised it disintegrates, and the thickened lining of the uterus is shed, [resulting in a period](http://womenshealth.gov/publications/our-publications/fact-sheet/menstruation.html).

You don't really remember how exactly babies are made, but maybe biology wasn't really your thing.

You don't know too much about conception

Congratulations! You definitely paid attention during biology and you remember how babies are actually made.

You know a lot about human conception

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Do You Actually Know How Babies Are Made?

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