Today's Rocket Words: Your 5 words and meanings to learn
fertilisation
when a sperm cell and an egg cell combine
embryo
the name of unborn offspring up to week 8 of development
zygote
a cell made from the fusion of two gametes
foetus
the name of unborn offspring from week 9 to birth
gamete
a male or female sex cell, i.e. a sperm cell or an egg cell