Short Answer Type
Long Answer TypeShort Answer TypeLong Answer TypeShort Answer Type(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.
Long Answer TypeWhat is ‘Test tube baby’ ?
Or
Describe test tube baby programme.
In the Test Tube Baby programmes, ovum from the wife or a donor female and the sperms from the husband or a donor are collected and allowed to fuse under simulated conditions in the laboratory to form zygote; it is called In-vitro fertilisation (IVF). The zygote or early embryo is transferred into the uterus or fallopian tube for further development; this process is called Embryo Transfer (ET) and can be done in the following ways :
(i) The zygote or embryo upto eight blastomeres is transferred into the fallopian tube;this process is called Zygote Intra Fallopian Transfer (ZIFT).
(ii) Embryos with more than eight blastomeres are transferred into the uterus by the process called Intra Uterine Transfer (IUT).
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