Sexual Intercourse

Question 1

Intercourse

Answer 1

During intercourse the mans penis fills with blood and becomes hard enough to be placed inside the woman’s vagina
A mixture of sperm cells and seminal fluid called semen is released into the vagina
The sperm swim up the uterus and into the Fallopian tubes

Question 2

Fertilisation

Answer 2

If an egg is present in the Fallopian tube,and a couple have sexual intercourse,then one of the sperm cells may fuse with it
The nuclei of the sperm and egg fuse together to form a fertilised egg,called a zygote.

Question 3

Implantation

Answer 3

The embryo embeds itself into the uterus wall

Question 4

Pregnancy

Answer 4

The uterus lining does not break down so menstruating stops during pregnancy. The average length of a human pregnancy is 40 weeks

Question 5

Amniotic fluid

Answer 5

As the embryo develops in the uterus it is protected inside a bag of fluid. This fluid provides a cushion for the embryo