Conception - from fertilisation to embryo
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Conception is when an egg is fertilised by a sperm. This usually happens 1 or 2 days after ovulation.
Over 4 to 5 days, the fertilised egg travels along the fallopian tube to the uterus for the egg to implant itself, and for pregnancy to begin.
- Ovulation
- Fertilisation
- Zygote
- 2-cell stage
- 4-cell stage
- 8-cell stage
- Blastocyst
- Blastocyst (hatching)
- Implantation in uterus
Fetal development
- Week 3 — brain and central nervous system
- Week 3-4 — heart
- Week 4 — upper limbs (arms)
- Week 4-5 — eyes
- Week 4-5 — lower limbs (legs)
- Week 7 — teeth
- Week 7 — palate
- Week 7-8 — external genitalia
- Week 4-5 — ears
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