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Reproductive Health — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYReproductive Health3 Marks
Question
  1. Explain the barrier methods of birth control.
  2. How is GIFT different from ZIFT?
✓

Answer

  1. The barrier methods prevent the physical meeting of the sperms and ovum:
  1. These methods are available for both males and females.
  2. Condoms are the barriers made of latex sheath and are used by males.
  3. Diaphragm, vault and cervical caps are also barriers used by females.
  1. Difference:
S.No.
GIFT
ZIFT
(i) 
It is a method of ART is which ovum collected from a woman is transferred to the fallopian tube of another woman.
In this method, the zygote or early embryo with upto 8-blastomeres is transferred into the fallopian tube of a woman for further development.
(ii)
It is advised for a woman who cannot produce functional gametes, but can provide suitable conditions for fertilisation and embryo development.
It is advised for a woman who cannot conceive but can provide suitable condition for implantation and further development of the embryo.
(iii)
It is a method of gamete transfer.
It is a method of embryo transfer.

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