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.

Explanation

(a) Surgical methods of contraception does not obstruct gamete formation. It obstructs transport of gamete in reproductive tract. So embryo is not implanted.
(b) Almost all are treated only treatment of AIDS is not possible.
(c) In rural areas due to less awareness, oral pills are not popular among rural females.
(d) Embryo having 8 blastomers is transferred by this method at this stage. It is called ZIFT (Zygote Intra Fallopian Transfer). Sometimes embryo bigger than 8 cells is implanted in uterus. It is called IUT.