Q. Which of the following is correct about human reproduction :
(a) ‘Saheli’ is a new contraceptive for males.
(b) Amniocentesis is carried out to know the chromosomal pattern from the sample taken from the cells of umbilical cord.
(c) Ovulation is facilitated by breast-feeding.
(d) A combination of progestogen and estrogen is injected or implanted under the skin as an effective contraceptive
Solution :
Correct option : D
Hormonal contraceptives use a combination of progestogen and estrogen. They can be used as implants under the skin or can be injected in order to achieve contraception. Saheli is a non-steroidal contraceptive for females, with least known side effects. It inhibits the implantation of the fertilised egg without disturbing the hormonal balance of the female. Condoms are available for both males and females. Condoms are barriers made up of rubber/thin latex and prevent the meeting of sperm and the ovum. During the period of intense lactation, there is suppression of ovulation and menstruation. Hence ovulation is not facilitated by breast-feeding.