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प्रश्न
List four ways of preventing pregnancy. State two advantages of using such preventive methods.
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उत्तर
Ways of preventing pregnancy:
(i) Natural methods: In this method, sexual act is avoided from day 10th to 17th of the menstrual cycle since during this period ovulation is expected. Therefore, the chances of fertilization are very high.
(ii) Barrier methods: 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 act as barriers. They are made of a thin rubber, which is used to cover the penis and vagina in males and females respectively.
(iii) Oral contraceptives: In this method, tablets or drugs are taken orally. These contain small doses of hormones which prevent the release of eggs and prevent fertilization.
(iv) Implants and surgical methods: Contraceptive devices such as the loop or Copper-T rods are placed in the uterus to prevent pregnancies. However, they can cause side effects in the uterus.
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संबंधित प्रश्न
Name one method of contraception which also protects against sexually transmitted diseases.
Which of the following method of contraception protects a person from acquiring a sexually transmitted disease?
(a) oral pills
(b) condom
(c) copper-T
(d) surgery
In the surgical method of birth control available for human females, the structures P in the reproductive system are cut and ligated (tied up) properly at both ends. This prevents the reproductive cell Q released by an organ R from entering the structures P so that Q is not available to fuse with another reproductive cell S coming from the male reproductive system. In this way, pregnancy is prevented.
(a) What are structures P?
(b) What is cell Q?
(c) Name the organ R.
(d) What is the reproductive cell S?
(e) What is the name of this surgical method of birth control available to females?
A woman uses pills A as a method of birth control (or preventing pregnancy). The pills A stop the ovaries from releasing ovum into oviducts. Another woman uses pills B as a method of birth control. The pills B kill the sperms and prevent pregnancy.
(a) What do the pills A contain?
(b) What is the common name of pills A?
(c) What do the pills B contain?
(d) What is the common name of pills B?
(e) What is the general name of these methods of birth control?
What is contraception ? List three reasons for adopting contraceptive methods.
Draw a well labelled diagram of L.S. human testis.
The period of pregnancy is called ______
It is believed that height of a child depends upon the genes inherited from parents. However, it is often seen that tall parents may have short children and vice-versa. Are there factors other than genes that can cause these variations?
When was family planning programs initiated in India?
Which initiative was introduced into the National Programme in 1995 to provide safe, side-effect-free contraception to women?
