Here's another reason why pregnant women should refrain from smoking: smoking - before, during or after pregnancy- can reduce a daughter's fertility by as much as two-thirds..

Researchers injected three groups of female mice with a low-dose mixture of PAH: One group received PAH before conception and again when they were providing milk for their pups; one group received PAH only before conception; and the third group received PAH only during lactation. A fourth control group did not receive PAH but were mated at the same time as the others. The total amount of PAH given to each mouse over the three-week injection cycle was equivalent to 25 packs of cigarettes, according to the researchers. The exposed mice did not have fewer pups in their own litters, but when researchers investigated the number of eggs in their female offspring, they found about 70 percent fewer follicles available to produce eggs.

In a separate study, smoking also seems to have a similar effect on unborn sons as well. Would you want your future children to have fertility problems? If you won't quit smoking for your own health, can't you do it for your child's?