Birth control pills are > 90% effective in preventing pregnancy. They also help regulate menstrual cycles, relieve menstrual pain, heavy menstruation, reduce acne, reduce the risk of ovarian and uterine cancers, and help treat endometriosis.
However, birth control pills do not protect against sexually transmitted diseases. สมัคร ufabet กับเรา รับโบนัสทันที To protect against sexually transmitted diseases, condoms should be used at all times.
Different types of birth control pills
Birth control pills are divided into two types of hormones.
- Combined hormones (estrogen and progesterone) are the most commonly used.
- Progesterone-only pills Emergency contraceptive pills are progesterone-only pills and are recommended for emergencies only. They are suitable for women who are breastfeeding or have a history of stroke or deep vein thrombosis.
Effectiveness of birth control pills
Birth control pills are about 93% effective at preventing pregnancy when taken daily. However, if a pill is missed, their effectiveness is reduced. Emergency contraception is only about 60-80% effective and is not recommended for routine use or as a primary method of contraception.
How birth control pills work
- Inhibits the maturation of eggs or prevents ovulation.
- Increases the viscosity of cervical mucus to make it harder for sperm to enter and fertilize.
- Makes the uterine wall thinner, making it less ready for a fertilized egg to implant.
How to take birth control pills
It may be started within the first 3-5 days of your period for best results.
Birth control pills come in many forms: 1) those that induce menstruation, such as 21 or 28 pills; 2) those that are taken long-term, such as 84 or 365 pills (less popular). Each type contains different ingredients and has different dosing schedules, so it is important to take the pills at the correct times for maximum effectiveness.
Combined hormones
The blister pack contains hormone-containing drugs and hormone-free or placebo-containing drugs.
- Conventional birth control pills
- A 28-day pack of birth control pills contains 21 real pills and 7 placebo pills, or 24 pills and 4 placebo pills. During the time you take the placebo pills, you will usually experience some menstrual-like bleeding. If you finish a pack of pills, you can start a new pack immediately.
- The 21-day birth control pill pack contains 21 pills and you stop taking the pills for 7 days, during which you usually have some bleeding. Then you start taking the pills again on day 29.
- Progesterone-only hormone pills
- The actual pills are 28 pills, which must be taken at the same time every day, no more than 3 hours apart.
- 24 real pills and 4 placebo pills
After taking birth control pills, when will they start to work?
If you start taking the pills within the first 3 days of your period, the pill pack will be effective in preventing pregnancy in this cycle. The pills will start to work after one week of taking them, so use condoms during the first week.