Question

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

Answer 1

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, hepatitis$-B$ and $AIDS$.
• Antibiotics can cure some of these diseases if diagnosed early.
• Sexually transmitted diseases such as $AIDS$, hepatitis$-B$ 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.