In a granular or what is sometimes known as a single layer green roof the filter fabric is used to separate larger granular material for drainage from finer material in the growing media. The ability of the geotextile to allow water permeability is referred to as hydraulic conductivity by permittivity.
There's general agreement that pregnant women and those trying to conceive should avoid consuming large quantities of caffeine. But after decades of controversy and conflicting evidence, there's still no consensus on how much caffeine is safe during pregnancy. To err on the side of caution, the March of Dimes advises women to limit their caffeine intake to less than 200 milligrams per day, which is about one 12-ounce cup of coffee.
(Peck, et al., 2010) However, it is wise for pregnant women to monitor their caffeine consumption and talk to their OB/GYN or physician about consuming caffeine during pregnancy as individual sensitivities may vary. Moderate caffeine consumption does not affect a woman's chances of getting pregnant. A 2003 review of the research on caffeine and fertility showed that consumption of caffeine at or below 300 mg did not reduce fertility.