Correct the following statements:
Surgical methods of contraception prevent gamete formation.
Surgical methods of contraception block gamete transport (not prevent gamete formation).
All sexually transmitted diseases are completely curable.
Not all sexually transmitted diseases are completely curable; some like HIV infection leading to AIDS, genital herpes, and hepatitis-B are not completely curable.
Oral pills are very popular contraceptives among the rural women.
Oral pills are very popular contraceptives among the urban women (not rural women).
In E. T. techniques, embryos are always transferred into the uterus.
In E. T. techniques, embryos can be transferred into the fallopian tube (ZIFT - Zygote Intra Fallopian Transfer) or into the uterus (IUT - Intra Uterine Transfer), depending on the stage of the embryo.
Explanation
This question tests understanding of contraceptive methods and assisted reproductive technologies from Chapter 3 (Reproductive Health). Each statement contains one key factual error that needs correction:
(a) Surgical methods like vasectomy and tubectomy work by blocking the vas deferens or fallopian tubes respectively - they prevent TRANSPORT of gametes, not their FORMATION. The gonads continue to produce gametes.
(b) Among the STIs mentioned in the textbook (gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B, and HIV leading to AIDS), some like HIV, hepatitis-B, and genital herpes are NOT completely curable.
(c) Oral contraceptive pills are more popular among urban women due to better access to healthcare and awareness, while rural women may prefer other methods.
(d) Embryo Transfer techniques vary based on the developmental stage - ZIFT transfers zygotes into the fallopian tube, while IUT transfers embryos into the uterus.