Reproduction - The process where new individuals are made , Sexual Reproduction - When 2 parents are needed to form an offspring, Gametes - Another word for a sex cell, Fertilisation - When the nucleus of the sperm joins with the nucleus of the egg to form a zygote, Zygote - A fertilised egg, Testosterone - Hormone that controls secondary male sexual characteristics, Puberty - The time when changes happen in a persons body, Oestrogen - The hormone that controls female sexual characteristics, Menstrual cycle - The monthly series of changes a woman goes through to prepare for possible pregnancy, Ovulation - The time during the mestrual cycle when the egg is released from the ovary into the fallopian tube, Menstruation - When blood and tissue leaves the uterus through the vagina, fertile period - The time when fertilisation can occur and the female can become pregnant, Sexual Intercourse - When the penis is placed into the vagina, Ejaculation - Ejection of semen from the penis into the vagina, Embryo - The name given to a baby during the first 9 weeks of pregnancy, Implantation - When the embryo attaches to the lining of the uterus, Foetus - The name given to a baby after the ninth week of pregnancy, Contraception - Prevents pregnancy , Mechanical Methods - Involve a barrier to prevent sperm meeting egg, Chemical Methods - Involves using a type of chemical to prevent pregnancy,

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