In sexual reproduction, males and females participate by producing sperm and eggs respectively. The male reproductive system produces sperm in the testicles and deposits it in the female system using the penis. The female reproductive system produces eggs in the ovaries and protects and nourishes potential new life in the uterus if fertilization occurs. If fertilization is successful, pregnancy lasts approximately nine months from embryo implantation to birth, during which stages the developing human progresses from childhood through adolescence and adulthood.

1. UNIT 3- HUMAN REPRODUCTION Natural Science 6th level
In sexual reproduction, two individuals of different sexes participate.
The offspring are similar to their parents.
● Male humans are called men. They produce sperm which are the
male sex cells.
● Female humans are called women. They produce eggs, which are the
female cells.
THE MALE REPRODUCTIVE SYSTEM
The male reproductive system has two functions: to produce sperm and
deposit the sperm inside the female reproductive system.
Parts:
- The testicles
- The penis
- The vas deferens
- The prostate
- The urethra
THE FEMALE REPRODUCTIVE SYSTEM
The female reproductive system has two functions: to produce eggs and
to protect and nourish new life if fertilisation occurs.
Parts:
- The vagina
- The ovaries
- The Fallopian Tubes
- The uterus
- The vulva
PREGNANCY
Pregnancy is the approximately nine-month period from when the embryo
implants itself in the uterine wall until the birth of the baby.

2. THE STAGES OF LIFE
● Childhood 1-10
● Adolescence 11-18
● Young adulthood +18
● Adulthood
● Old age