Can you elaborate on why you think Google wouldn't know before FB? Many (most?) people don't go posting anything about pregnancy before for ~3 months tradition

Can you elaborate on why you think Google wouldn't know before FB? Many (most?) people don't go posting anything about pregnancy before for ~3 months traditionally, and odds are you are going to be searching for symptoms when you first notice something is wrong health-wise. When a doctor or test confirms you are pregnant, I'd be willing to bet that users are immediately pulling up their favorite search engine to figure out next steps vs. blabbing about it to their BFFs on FB. Now, if you are basing it purely off of carpet bombing people targeting off of demographics, yes, FB probably has more solid data there as it is self-reported and not inferred. But you sure as heck won't get self-reported pregnancy info earlier than Google will know you are interested in it. If anything, I'd argue Amazon would have that data in a similar timeframe if people start looking up pregnancy books. This also entirely discounts the notion that there is 3rd party data sets at play which both Google and FB leverage to enrich their data. All of this is not to say your point on the brand advertising is incorrect--I actually agree with that as the "feed" has become the new television. But definitely do not agree on the specific example cited.