1. Bad-quality eggs.
Today’s medical news reports that the quality of the eggs could interfere with a successful pregnancy. As a female ages, her egg production and quality decline. Eggs that are damaged or have genetic defects can also be incapable of sustaining a pregnancy. As a woman ages, the threat grows.

2. Smoking.
Smoking increases the incidence of infertility in both sexes and has a significant detrimental effect on the efficacy of reproductive therapies. Smoking increases the risk of miscarriage during pregnancy. Passive smoking has also been linked to decreased fertility.

Read more>>>https://medicalcaremedia.com/5-factors-can-prevent-a-woman-from-becoming-pregnant/