Birth Control Shot

by: Megha T. and Eric T. TB 4

What is it?

It is a long acting form of progesterone, which is a hormone that is naturally manufactured in a female's ovaries. It is given as an injection in the upper arm or in the buttocks once every 3 months.

How does it work?

It works by preventing ovulation. If the female doesn't ovulate, then she doesn't get pregnant.

How well does it work?

It is a very effective method of birth control. Only 3% of couples who use the birth control shot regularly will have an accidental pregnancy. The effectiveness depends on the female's body.

What does it protect against?

It protects against pregnancy, but may increase the risk of contracting STD's.

What are the side effects?

Women will notice a change in their periods. They may have:

  • Irregular or no menstrual periods
  • Weight gain
  • Depression
  • Headaches
  • Breast tenderness

Prolonged use may effect bone density of girls. Smoking may increase chances of side effects. They may also notice a decrease of fertility a year after they stop taking The Shot, but it does not cause infertility.

Who uses it?

Females who have been cleared by their physician are eligible for use of the birth control shot.

How does one get this contraceptive?

It is prescribed and administered by a doctor.

How much does it cost?

It costs about $60, but will often be covered by insurance.


In conclusion, we think that the birth control shot is a good method of contraception. There are very few accidental pregnancies minimal side effects. It is a long acting and widely used form of contraception.