Birth control (also called contraception) is how you prevent pregnancy. There are many different types of birth control. Birth control only works when you use it correctly. Let me tell you some types of contraception and how they work ;

1 Barrier Methods:
- Condoms :Create a physical barrier to prevent sperm from reaching the egg.
- Diaphragms/Cervical Caps: Block the cervix to prevent sperm from entering the uterus.

2 Hormonal Methods:
- Birth Control Pills: Release hormones to prevent ovulation and thicken cervical mucus.
- Patch: Releases hormones through the skin to prevent ovulation.
- Injectable Contraceptives: Injections of hormones that prevent ovulation.
- Hormonal IUD: Releases hormones locally to prevent ovulation and change cervical mucus.

3 Intrauterine Devices (IUDs):
- Copper IUD: Creates a hostile environment for sperm and changes the lining of the uterus.
- Hormonal IUD: Prevents ovulation, thickens cervical mucus, and changes uterine lining.

4 Permanent Methods:
- Tubal Ligation (for women): Fallopian tubes are blocked or cut to prevent eggs from reaching the uterus.
- Vasectomy (for men): Vas deferens are cut or blocked to prevent sperm from reaching the semen.

5 Emergency Contraception:
- Morning-After Pill: Contains high doses of hormones to prevent pregnancy if taken shortly after unprotected sex.

6 Natural Methods:
- Fertility Awareness Methods: Tracking menstrual cycle to determine fertile days.
- Withdrawal Method: Man withdraws before ejaculation to prevent sperm from entering the vagina.

Each method has its own level of effectiveness and considerations. It's important to consult a healthcare professional to choose the best option for your individual needs and circumstances.