REPRODUCTION - HUMANS -

• Fertilization occurs when a sperm cell fuses with an egg, creating a zygote.
• In copulation, sperm travel from the male reproductive tract to the female reproductive tract.
• During the process of ovulation, mammals release an egg from the ovaries.
• The uterus is where fertilized eggs implant and develop into embryos.
• Birth is triggered by hormonal changes that cause contractions of the uterus muscles.
• During the fetal stage, organs begin to function independently and the baby gains weight rapidly.