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1Sperm and Ova The sperm is the male reproductive cell and the ova is the female reproductive cell which is also known as the egg.Fertilisation
Fertilisation which is also known as conception is when the sperm travels to the egg which the genetic materials fuse together to form a zygote. a zygote contain 23 chromosomes each from the sperm and the ova.
2Germinal Stage The germinal stage starts at fertilisation and ends 2 weeks later. The zygote travels down one of the fallopian tubes while constantly dividing. The zygote becomes an embryo and and the placenta starts to form.Embyronic Stage
The embyronic stage starts at 3 weeks and ends at 8 weeks. This stage is when all the stages of human development begin. The limbs begin to grow and so do all the organs.
3Foetal Stage 8 weeks until birth. Most organs and systems are fully functional except the lungs. The placenta is fully developed.Physical