Pregnancy friendly lubricant?

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I've just been looking into Sylk and here's what their website says

"Although Sylk is not intended as a spermicide, Sylk's pH balance can affect motility, the movement of sperm and should therefore not be used if pregnancy is desired. (Also true of most other personal lubricants!)

When ovulation occurs, the pH balance changes to around 7 which is a neutral pH state. Sylk has a pH balance of 4.5 - 4.7, similar to the normal vaginal environment, i.e. slightly acidic. This is deliberate to keep the vagina healthy and not alter the balance.

If you're trying for a baby, we suggest Pre-seed - click on this name or see our Links & Resources Page. Avoid petroleum jelly, massage oils, aromatic oils, baby or other oils made from minerals and containing paraffin and fragrances, at all times.

However, once you're confirmed pregnant, you can safely return to using Sylk because it is gentle, healthy and 100% free from petrochemicals like paraben perservative and propylene glycol."

added that last paragraph...sorry I misread the post...thought it was what lube to use when TTC