NCERT Solution for Class 10 Science Chapter 8
How do Organisms Reproduce?
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Exercises Questions
Page No-141
Questions No-8
What are the different methods of contraception?
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There are various methods of contraception, also known as birth control, which individuals or couples can use to prevent unwanted pregnancies. Contraceptive methods vary in terms of their effectiveness, convenience, and suitability for different individuals.
1. Barrier Methods:
. Condoms: Male and female condoms create a physical barrier that prevents sperm from reaching the egg. They are also effective in reducing the risk of sexually transmitted infections (STIs).
. Diaphragms and Cervical Caps: These devices are placed inside the vagina to cover the cervix, preventing sperm from entering the uterus.
2.Hormonal Methods:
. Birth Control Pills: Oral contraceptive pills contain hormones (usually a combination of estrogen and progestin) that prevent ovulation and thicken cervical mucus to block sperm.
. Birth Control Patch: The contraceptive patch is worn on the skin and releases hormones to prevent pregnancy.
. Birth Control Shot (Depo-Provera): This is an injection of progestin that provides protection against pregnancy for several months.
Birth Control Implant (Nexplanon): A small, flexible rod is inserted under the skin of the upper arm, releasing progestin to prevent pregnancy for several years.
. Intrauterine Devices (IUDs): These are small, T-shaped devices placed inside the uterus. There are hormonal and non-hormonal IUDs, and they can provide contraception for several years.
3. Long-Acting Reversible Contraception (LARC):
. LARC methods include IUDs and contraceptive implants. They are highly effective and require little ongoing maintenance.
4. Emergency Contraception:
. Emergency contraceptive pills (often called the morning-after pill) can be taken within a few days of unprotected intercourse to prevent pregnancy.
. Copper IUDs can also be used as emergency contraception if inserted within a specific timeframe after unprotected intercourse.
5. Sterilization:
. Surgical sterilization involves permanently blocking or sealing the fallopian tubes in women (tubal ligation) or cutting the vas deferens in men (vasectomy).
6. Natural Methods:
. Fertility Awareness-Based Methods: These methods involve tracking a woman’s menstrual cycle and avoiding intercourse during fertile periods.
. Withdrawal (Pull-out) Method: This involves the male withdrawing the penis before ejaculation.
7. Lactational Amenorrhea Method (LAM):
. LAM is a method of contraception that relies on breastfeeding to suppress ovulation during the postpartum period.
8. Behavioral Methods:
. These methods involve abstaining from sexual intercourse on certain days or using specific techniques to prevent pregnancy. Examples include the Standard Days Method and the Symptothermal Method.
9. Female Condoms: Female condoms are worn inside the vagina to prevent sperm from reaching the egg.
10. Spermicides: These are chemicals that kill or immobilize sperm. They are available as foams, gels, creams, or suppositories.
It’s important to note that the choice of contraception should be made based on individual preferences, medical history, and the advice of healthcare professionals. The effectiveness of different methods can vary, and no method is 100% foolproof. Therefore, individuals should consider their specific needs and circumstances when selecting a contraceptive method. Additionally, some methods, such as condoms, offer protection against sexually transmitted infections (STIs), while others do not, so using condoms in combination with other methods can provide dual protection.
Methods of contraception :-
(i) Use Barriers – It prevents the sperm to reach the egg. For eg. Condoms, Diaphragm.
(ii) Chemicals – There are various chemicals or medicines which act by changing the hormonal balance of the body, So that fertilization cannot occur.
(iii) Surgical – If vas deferens in male or fallopian tube in female is blocked , transfer of sperm or transfer of egg will be prevented respectively.
The contraceptive methods can be broadly divided into the following types:
• Natural method: It involves avoiding the chances of meeting of sperms and ovum.
In this method, the sexual act is avoided from day 10th to 17th of the menstrual
cycle because during this period, ovulation is expected and therefore, the chances
of fertilization are very high.
• Barrier method: In this method, the fertilization of ovum and sperm is prevented
with the help of barriers. Barriers are available for both males and females.
Condoms are barriers made of thin rubber that are used to cover penis in males
and vagina in females.
• Oral contraceptives: In this method, tablets or drugs are taken orally. These
contain small doses of hormones that prevent the release of eggs and thus
fertilization cannot occur.
• Implants and surgical methods: Contraceptive devices such as the loop or
Copper-T are placed in uterus to prevent pregnancy. Some surgical methods can
also be used to block the gamete transfer. It includes the blocking of vas deferens
to prevent the transfer of sperms known as vasectomy. Similarly, fallopian tubes
of the female can be blocked so that the egg will not reach the uterus known as
tubectomy.
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