I was just reading...I know should be working..ANYWAYS thought I might share:-
Fertility fact 5: Lubricant won't help sperm to slip, slide and get inside
Not only is this not true, it could actually prevent you from getting pregnant, says Dr Knight.Most lubricants change the pH or acid balance inside the vagina, and that in turn may affect sperm motility and ultimately prevent, or at least reduce the chances of a pregnancy occurring.
If you find you must use a lubricant avoid petroleum jelly. Instead try natural vegetable products, such as olive oil, which is less likely to cause sperm any serious problems.