Q: What are the female sex cells called?, A: They are called eggs or ova., Q: Where are eggs formed?, A: They are formed in the ovaries., Q: Approximately how often does an egg begin to mature in an ovary?, A: Approximately every 28 days., Q: What is the time called when women gradually stop producing mature eggs and menstruation stops?, A: This time is called the menopause., Q: What are the male sex cells called?, A: They are called sperm or spermatozoa., Q: How are sperm described in terms of size and structure?, A: They are very small and have a head and a long tail., Q: Where are sperm formed?, A: They are formed in the testicles., Q: What fluid do sperm and fluid from the prostate form?, A: They form semen., Q: What is the process in which a sperm cell joins with an egg cell to produce a zygote called?, A: This is called fertilisation., Q: What is the name of the process where the egg, some blood, and tissue from the uterus come out of the vagina?, A: This is called menstruation or having a period., Is fertilisation internal or external in humans?, It is internal., Where does fertilisation usually occur?, It usually occurs in the fallopian tube., What is a fertilised egg called?, A fertilised egg is called a zygote., What happens to the zygote after fertilisation?, It divides into many cells and becomes an embryo., What happens when the embryo arrives in the uterus?, It implants itself and continues to grow and develop into a baby.

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