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Question

Correct the following statements:
(a) Surgical methods of contraception prevent gamete formation.
(b) All sexually transmitted diseases are completely curable. (c) Oral pills are very popular contraceptives among the rural women.
(d) In E.T. techniques, embryos are always transferred into the uterus.

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Solution

Surgical methods of contraception :
In surgical methods, fallopian tube in female and vas deferens in males are cut and tied. This prevents the transport of gametes and hence acts as a contraceptive.
This method does not have any effect on gamete formation.

Final Answer:
Surgical methods of contraception prevent gamete transfer.


Sexually transmitted diseases:
  • Sexually transmitted diseases are diseases transmitted through body fluids during sexual intercourse such as gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitisB and AIDS.
  • Antibiotics can cure some of these diseases if diagnosed early.
  • Sexually transmitted diseases such as AIDS, hepatitisB are caused by a virus and are not completely curable.
Final Answer:
All sexually transmitted diseases are not completely curable.


Popularity of oral pills:
Oral contraceptives are a combination of estrogen and progesterone salts. They work by the following:
  • Inhibiting ovulation
  • Changing the quality of cervical mucus
  • Inhibiting implantation
They are popular among urban women.

Final Answer:
Oral pills are very popular contraceptives among urban women.


Embryo transfer techniques:
  • Cleavage and mitosis in the zygote transforms it into an embryo.
  • It is transferred in the uterus or fallopian tube depending upon the number of cells that it has.
  • Embryo containing 8 cells is transferred into the fallopian tube.
  • Embryos containing more than 8 cells are transferred into the uterus.
Final Answer:
Embryo with 8 cells is transferred to the fallopian tube while embryo with more than 8 cells is transferred to the uterus.

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