Lining of uterus thickens with blood, Ovulation occurs (egg released from ovary), Egg enters fallopian tube, Sperm is made in the testicles, Sperm exit the testicles and travel up the vas deferens, Sperm cells mix with semen, Erect penis is inserted into vagina (sexual intercourse), Sperm cells leave the penis (ejaculation) and enter vagina, Sperm travel through the cervix, uterus, and into fallopian tubes, One sperm cell attaches to an egg and forms one cell (fertilization), Cell starts to divide, Cells (zygote) travel through fallopian tube to uterus, Cells attach to wall of uterus (implantation).

Steps of Reproduction

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