Find the odd one out $w.r.t.$ Saheli.

The use of spermicidal creams,jellies,and foams along with barrier methods is used to:

What is the significance of the progesterone-estrogen combination as a contraceptive measure?

Choose the correct statement among the following regarding $IUDs$:

In lactational amenorrhoea,there is no ovulation or menstruation during the period of intense lactation following parturition,due to high levels of prolactin,which:

Match the columns:

Column $I$	Column $II$
$(a)$ Physical method	$(p)$ Synthesized rubber or plastic cap
$(b)$ Diaphragms	$(q)$ Spermicidal substance
$(c)$ Chemical method	$(r)$ Condoms