Ovulation - An egg cell is released from the ovary, Conception - A sperm cell penetrates the egg to fertilise it. The fertilised egg cell is called a zygote., Cell division - The fertilised egg divides as it travels down the oviduct, forming a ball of cells called an embryo., Implantation - The embryo implants into the uterus lining., 4 weeks - The embryo is 6mm long. The heart and other organs start to form and the heart begins to beat., 9 weeks - Arms begin to grow and toes and eyelids begin to form. The embryo is now called a foetus., 12 weeks - The foetus begins to look more like a baby. It is now around 60mm long and starts to move around., 20 weeks - The foetus is now 160mm long. It begins kicking and can hear sounds outside the uterus., 28 weeks: - The baby has hair and can open its eyes. There is a high chance that the baby would survive if it was born now., 40 weeks - The baby is fully developed and ready to be born. It is now around 520mm long.,

Developing baby

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