In the rhythm method of birth control, the couple refrains from intercourse
One day before and after ovulation
Two days before and after ovulation
Three days before and after ovulation
One week before and after ovulation
Find out the right aspects of lactational amenorrhoea
$I$. Ovulation do not occur during the lactational period
$II$. Chances of the failure of contraception are almost nil upto six months following parturition
$III$. Side effects are almost nil
$IV$. It is a natural method of contraception
$V$. It increases phagocytosis of sperms
Surgical removal of testes is known as
Spermicidal.....
Choose the right one among the statements given below:
Copper ions-releasing $\rm {(IUD)}$ are more efficient than non-medicated methods. Why ?