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Fertilization

sperm preparation

Sperm-egg recognition and binding

sperm-egg fusion

Fusion of sperm and egg pronuclei and activation of the zygote

Pregnancy

The fertilised egg rapidly divides into layers of cells

Implants in the wall of your womb where it carries on growing

The fetus grows to about 30 cm and the mother usually feels the first movements. The placenta has taken over the functions of nutrition and waste

The fetus grows to 3 to 4 kg. Organ development continues to birth (and some systems, such as the nervous system and liver, continue to develop after birth)