____ is when the ____ from the sperm and egg cell fuse together to create a ____. Fertilisation takes place in the ____. A zygote is the first cell created after fertilisation which has a full set of ____. After fertilisation the zygote divides repeatedly by mitosis making a ball of cells called an ____. This attaches to the ____ wall. A ____ develops and approximately 8 weeks after fertilisation the developing embryo is called a ____. An umbilical cord connects it to the placenta. The placenta allows food and ____ to pass from the mothers blood to the foetus's blood and waste products can be removed.

Fertilisation and development

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