Question

Which contraceptive device makes the uterus unsuitable for implantation?
A. Progestasert
B. CuT
C. Lippes loop
D. Multiload

Answer 1

Hint: Variety of methods are known for birth control. These methods prevent fertilization are referred to as contraceptive methods. These methods are grouped into three types: temporary method, permanent method and medical termination.
All above mentioned methods are temporary methods. Progestasert, CuT, Lippes loop and multiload are intrauterine devices (IUDs).

Complete Answer:
These IUDs are plastic or metal objects placed in the uterus of the female by a doctor.
A. Progestasert: These are hormone releasing IUDs. They turn the cervix hostile to spermatozoa and bring changes in the uterus making it unsuitable for implantation.
B. CuT: These are copper releasing IUDs. The Cu ions released by some IUDs suppress motility of sperms as well as their fertilizing capacity.
C. Lippes loop: These are non-mediated and left in the uterine cavity for an indefinite amount of time. Lippes loop device was introduced in 1962. It was a plastic double “S” loop and it reduced the incidence of expulsion.
D. Multiload: It is also an example of copper releasing IUDs. The Cu ions suppress the sperm motility and hence suppress fertilization.

The correct option is A.

Note: (i) IUDs are ideal contraceptives for the females who want to delay pregnancy and/or space children. It is the most widely accepted method of contraception in India.
(ii) IUD increases phagocytosis of sperms within the uterus.
(iii) Progestasert is a T shaped IUD made up of ethylene and vinyl acetate copolymer containing titanium dioxide.
(iv) IUDs mainly work by changing the intrauterine environment and making it spermicidal.
(v) Hormone releasing IUDs add progesterone effect on endometrium and they mainly act by inhibition of implantation, sperm capacitation and survival and thus make uterus unsuitable for implantation.
(vi) Another example of hormone releasing IUDs is LNG-20.